winpos.c

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/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS kernel
 * PURPOSE:     Windows
 * PROGRAMER:   Casper S. Hornstrup (chorns@users.sourceforge.net)
 *              Katayama Hirofumi MZ (katayama.hirofumi.mz@gmail.com)
 */
 
#include <win32k.h>
#include <immdev.h>
DBG_DEFAULT_CHANNEL(UserWinpos);
 
/* GLOBALS *******************************************************************/
 
#define MINMAX_NOSWP  (0x00010000)
 
#define SWP_EX_NOCOPY 0x0001
#define SWP_EX_PAINTSELF 0x0002
 
#define  SWP_AGG_NOGEOMETRYCHANGE \
    (SWP_NOSIZE | SWP_NOCLIENTSIZE | SWP_NOZORDER)
#define  SWP_AGG_NOPOSCHANGE \
    (SWP_NOSIZE | SWP_NOMOVE | SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE | SWP_NOZORDER)
#define  SWP_AGG_STATUSFLAGS \
    (SWP_AGG_NOPOSCHANGE | SWP_FRAMECHANGED | SWP_HIDEWINDOW | SWP_SHOWWINDOW)
#define SWP_AGG_NOCLIENTCHANGE \
    (SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE)
 
#define EMPTYPOINT(pt) ((pt).x == -1 && (pt).y == -1)
#define PLACE_MIN               0x0001
#define PLACE_MAX               0x0002
#define PLACE_RECT              0x0004
 
/* FUNCTIONS *****************************************************************/
 
#if DBG
/***********************************************************************
 *           dump_winpos_flags
 */
static void dump_winpos_flags(UINT flags)
{
    static const DWORD dumped_flags = (SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOREDRAW |
                                       SWP_NOACTIVATE | SWP_FRAMECHANGED | SWP_SHOWWINDOW |
                                       SWP_HIDEWINDOW | SWP_NOCOPYBITS | SWP_NOOWNERZORDER |
                                       SWP_NOSENDCHANGING | SWP_DEFERERASE | SWP_ASYNCWINDOWPOS |
                                       SWP_NOCLIENTSIZE | SWP_NOCLIENTMOVE | SWP_STATECHANGED);
    TRACE("flags:");
    if(flags & SWP_NOSIZE) TRACE(" SWP_NOSIZE");
    if(flags & SWP_NOMOVE) TRACE(" SWP_NOMOVE");
    if(flags & SWP_NOZORDER) TRACE(" SWP_NOZORDER");
    if(flags & SWP_NOREDRAW) TRACE(" SWP_NOREDRAW");
    if(flags & SWP_NOACTIVATE) TRACE(" SWP_NOACTIVATE");
    if(flags & SWP_FRAMECHANGED) TRACE(" SWP_FRAMECHANGED");
    if(flags & SWP_SHOWWINDOW) TRACE(" SWP_SHOWWINDOW");
    if(flags & SWP_HIDEWINDOW) TRACE(" SWP_HIDEWINDOW");
    if(flags & SWP_NOCOPYBITS) TRACE(" SWP_NOCOPYBITS");
    if(flags & SWP_NOOWNERZORDER) TRACE(" SWP_NOOWNERZORDER");
    if(flags & SWP_NOSENDCHANGING) TRACE(" SWP_NOSENDCHANGING");
    if(flags & SWP_DEFERERASE) TRACE(" SWP_DEFERERASE");
    if(flags & SWP_ASYNCWINDOWPOS) TRACE(" SWP_ASYNCWINDOWPOS");
    if(flags & SWP_NOCLIENTSIZE) TRACE(" SWP_NOCLIENTSIZE");
    if(flags & SWP_NOCLIENTMOVE) TRACE(" SWP_NOCLIENTMOVE");
    if(flags & SWP_STATECHANGED) TRACE(" SWP_STATECHANGED");
 
    if(flags & ~dumped_flags) TRACE(" %08x", flags & ~dumped_flags);
    TRACE("\n");
}
#endif
 
BOOL FASTCALL
IntGetClientOrigin(PWND Window OPTIONAL, LPPOINT Point)
{
   Window = Window ? Window : UserGetDesktopWindow();
   if (Window == NULL)
   {
      Point->x = Point->y = 0;
      return FALSE;
   }
   Point->x = Window->rcClient.left;
   Point->y = Window->rcClient.top;
 
   return TRUE;
}
 
VOID FASTCALL
IntGetClientRect(PWND Wnd, RECTL *Rect)
{
   ASSERT( Wnd );
   ASSERT( Rect );
   if (Wnd->style & WS_MINIMIZED)
   {
      Rect->left = Rect->top = 0;
      Rect->right = UserGetSystemMetrics(SM_CXMINIMIZED);
      Rect->bottom = UserGetSystemMetrics(SM_CYMINIMIZED);
      return;
   }
   if (!UserIsDesktopWindow(Wnd))
   {
      *Rect = Wnd->rcClient;
      RECTL_vOffsetRect(Rect, -Wnd->rcClient.left, -Wnd->rcClient.top);
   }
   else
   {
      Rect->left = Rect->top = 0;
      Rect->right  = Wnd->rcClient.right;
      Rect->bottom = Wnd->rcClient.bottom;
   /* Do this until Init bug is fixed. This sets 640x480, see InitMetrics.
      Rect->right  = UserGetSystemMetrics(SM_CXSCREEN);
      Rect->bottom = UserGetSystemMetrics(SM_CYSCREEN);
   */
   }
}
 
BOOL FASTCALL
IntGetWindowRect(PWND Wnd, RECTL *Rect)
{
   ASSERT( Wnd );
   ASSERT( Rect );
   if (!Wnd) return FALSE;
   if (!UserIsDesktopWindow(Wnd))
   {
       *Rect = Wnd->rcWindow;
   }
   else
   {
       Rect->left = Rect->top = 0;
       Rect->right = Wnd->rcWindow.right;
       Rect->bottom = Wnd->rcWindow.bottom;
/* Do this until Init bug is fixed. This sets 640x480, see InitMetrics.
       Rect->right = GetSystemMetrics(SM_CXSCREEN);
       Rect->bottom = GetSystemMetrics(SM_CYSCREEN);
*/   }
   return TRUE;
}
 
 
INT FASTCALL
IntMapWindowPoints(PWND FromWnd, PWND ToWnd, LPPOINT lpPoints, UINT cPoints)
{
    BOOL mirror_from, mirror_to;
    POINT Delta;
    UINT i;
    int Change = 1;
 
    /* Note: Desktop Top and Left is always 0! */
    Delta.x = Delta.y = 0;
    mirror_from = mirror_to = FALSE;
 
    if (FromWnd && !UserIsDesktopWindow(FromWnd))
    {
       if (FromWnd->ExStyle & WS_EX_LAYOUTRTL)
       {
          mirror_from = TRUE;
          Change = -Change;
          Delta.x = -FromWnd->rcClient.right;
       }
       else
          Delta.x = FromWnd->rcClient.left;
       Delta.y = FromWnd->rcClient.top;
    }
 
    if (ToWnd && !UserIsDesktopWindow(ToWnd))
    {
       if (ToWnd->ExStyle & WS_EX_LAYOUTRTL)
       {
          mirror_to = TRUE;
          Change = -Change;
          Delta.x += Change * ToWnd->rcClient.right;
       }
       else
          Delta.x -= Change * ToWnd->rcClient.left;
       Delta.y -= ToWnd->rcClient.top;
    }
 
    for (i = 0; i != cPoints; i++)
    {
        lpPoints[i].x += Delta.x;
        lpPoints[i].x *= Change;
        lpPoints[i].y += Delta.y;
    }
 
    if ((mirror_from || mirror_to) && cPoints == 2)  /* special case for rectangle */
    {
       int tmp = min(lpPoints[0].x, lpPoints[1].x);
       lpPoints[1].x = max(lpPoints[0].x, lpPoints[1].x);
       lpPoints[0].x = tmp;
    }
 
    return MAKELONG(LOWORD(Delta.x), LOWORD(Delta.y));
}
 
BOOL FASTCALL
IntClientToScreen(PWND Wnd, LPPOINT lpPoint)
{
   if (Wnd && Wnd->fnid != FNID_DESKTOP )
   {
      if (Wnd->ExStyle & WS_EX_LAYOUTRTL)
         lpPoint->x = Wnd->rcClient.right - lpPoint->x;
      else
         lpPoint->x += Wnd->rcClient.left;
      lpPoint->y += Wnd->rcClient.top;
   }
   return TRUE;
}
 
BOOL FASTCALL
IntScreenToClient(PWND Wnd, LPPOINT lpPoint)
{
    if (Wnd && Wnd->fnid != FNID_DESKTOP )
    {
       if (Wnd->ExStyle & WS_EX_LAYOUTRTL)
          lpPoint->x = Wnd->rcClient.right - lpPoint->x;
       else
          lpPoint->x -= Wnd->rcClient.left;
       lpPoint->y -= Wnd->rcClient.top;
    }
    return TRUE;
}
 
BOOL FASTCALL IsChildVisible(PWND pWnd)
{
    do
    {
        if ( (pWnd->style & (WS_POPUP|WS_CHILD)) != WS_CHILD ||
            !(pWnd = pWnd->spwndParent) )
           return TRUE;
    }
    while (pWnd->style & WS_VISIBLE);
    return FALSE;
}
 
PWND FASTCALL IntGetLastTopMostWindow(VOID)
{
    PWND pWnd;
    PDESKTOP rpdesk = gptiCurrent->rpdesk;
 
    if ( rpdesk &&
        (pWnd = rpdesk->pDeskInfo->spwnd->spwndChild) &&
         pWnd->ExStyle & WS_EX_TOPMOST)
    {
        for (;;)
        {
           if (!pWnd->spwndNext) break;
           if (!(pWnd->spwndNext->ExStyle & WS_EX_TOPMOST)) break;
           pWnd = pWnd->spwndNext;
        }
        return pWnd;
    }
    return NULL;
}
 
VOID
SelectWindowRgn(PWND Window, HRGN hRgnClip)
{
    if (Window->hrgnClip)
    {
        /* Delete no longer needed region handle */
        IntGdiSetRegionOwner(Window->hrgnClip, GDI_OBJ_HMGR_POWNED);
        GreDeleteObject(Window->hrgnClip);
        Window->hrgnClip = NULL;       
    }
 
    if (hRgnClip > HRGN_WINDOW)
    {
        /*if (!UserIsDesktopWindow(Window))
        {
            NtGdiOffsetRgn(hRgnClip, Window->rcWindow.left, Window->rcWindow.top);
        }*/
        /* Set public ownership */
        IntGdiSetRegionOwner(hRgnClip, GDI_OBJ_HMGR_PUBLIC);
 
        Window->hrgnClip = hRgnClip;
    }
}
 
//
// This helps with CORE-6129 forcing modal dialog active when another app is minimized or closed.
//
BOOL FASTCALL ActivateOtherWindowMin(PWND Wnd)
{
    BOOL ActivePrev, FindTopWnd;
    PWND pWndTopMost, pWndChild, pWndSetActive, pWndTemp, pWndDesk;
    USER_REFERENCE_ENTRY Ref;
    PTHREADINFO pti = gptiCurrent;
 
    //ERR("AOWM 1 %p\n", UserHMGetHandle(Wnd));
    ActivePrev = (pti->MessageQueue->spwndActivePrev != NULL);
    FindTopWnd = TRUE;
 
    if ((pWndTopMost = IntGetLastTopMostWindow()))
       pWndChild = pWndTopMost->spwndNext;
    else
       pWndChild = Wnd->spwndParent->spwndChild;
 
    for (;;)
    {
       if ( ActivePrev )
          pWndSetActive = pti->MessageQueue->spwndActivePrev;
       else
          pWndSetActive = pWndChild;
 
       pWndTemp = NULL;
 
       while(pWndSetActive)
       {
          if ( VerifyWnd(pWndSetActive) &&
              !(pWndSetActive->ExStyle & WS_EX_NOACTIVATE) &&
               (pWndSetActive->style & (WS_VISIBLE|WS_DISABLED)) == WS_VISIBLE &&
               (!(pWndSetActive->style & WS_ICONIC) /* FIXME MinMax pos? */ ) )
          {
             if (!(pWndSetActive->ExStyle & WS_EX_TOOLWINDOW) )
             {
                UserRefObjectCo(pWndSetActive, &Ref);
                //ERR("ActivateOtherWindowMin Set FG 1\n");
                co_IntSetForegroundWindow(pWndSetActive);
                UserDerefObjectCo(pWndSetActive);
                //ERR("AOWM 2 Exit Good %p\n", UserHMGetHandle(pWndSetActive));
                return TRUE;
             }
             if (!pWndTemp ) pWndTemp = pWndSetActive;
          }
          if ( ActivePrev )
          {
             ActivePrev = FALSE;
             pWndSetActive = pWndChild;
          }
          else
             pWndSetActive = pWndSetActive->spwndNext;
       }
 
       if ( !FindTopWnd ) break;
       FindTopWnd = FALSE;
 
       if ( pWndChild )
       {
          pWndChild = pWndChild->spwndParent->spwndChild;
          continue;
       }
 
       if (!(pWndDesk = IntGetThreadDesktopWindow(pti)))
       {
          pWndChild = NULL;
          continue;
       }
       pWndChild = pWndDesk->spwndChild;
    }
 
    if ((pWndSetActive = pWndTemp))
    {
       UserRefObjectCo(pWndSetActive, &Ref);
       //ERR("ActivateOtherWindowMin Set FG 2\n");
       co_IntSetForegroundWindow(pWndSetActive);
       UserDerefObjectCo(pWndSetActive);
       //ERR("AOWM 3 Exit Good %p\n", UserHMGetHandle(pWndSetActive));
       return TRUE;
    }
    //ERR("AOWM 4 Bad\n");
    return FALSE;
}
 
/*******************************************************************
 *         can_activate_window
 *
 * Check if we can activate the specified window.
 */
static
BOOL FASTCALL can_activate_window( PWND Wnd OPTIONAL)
{
    LONG style;
 
    if (!Wnd) return FALSE;
 
    style = Wnd->style;
    if (!(style & WS_VISIBLE)) return FALSE;
    if (style & WS_MINIMIZE) return FALSE;
    if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return FALSE;
    if (Wnd->ExStyle & WS_EX_NOACTIVATE) return FALSE;
    return TRUE;
    /* FIXME: This window could be disable because the child that closed
              was a popup. */
    //return !(style & WS_DISABLED);
}
 
 
/*******************************************************************
 *         WinPosActivateOtherWindow
 *
 *  Activates window other than pWnd.
 */
VOID FASTCALL
co_WinPosActivateOtherWindow(PWND Wnd)
{
   PWND WndTo = NULL;
   USER_REFERENCE_ENTRY Ref;
 
   ASSERT_REFS_CO(Wnd);
 
   if (IntIsDesktopWindow(Wnd))
   {
      //ERR("WinPosActivateOtherWindow Set Focus Msg Q No window!\n");
      IntSetFocusMessageQueue(NULL);
      return;
   }
 
   /* If this is popup window, try to activate the owner first. */
   if ((Wnd->style & WS_POPUP) && (WndTo = Wnd->spwndOwner))
   {
      TRACE("WPAOW Popup with Owner\n");
      WndTo = UserGetAncestor( WndTo, GA_ROOT );
      if (can_activate_window(WndTo)) goto done;
   }
 
   /* Pick a next top-level window. */
   /* FIXME: Search for non-tooltip windows first. */
   WndTo = Wnd;
   for (;;)
   {
      if (!(WndTo = WndTo->spwndNext))  break;
      if (can_activate_window( WndTo )) goto done;
   }
 
   /*
      Fixes wine win.c:test_SetParent last ShowWindow test after popup dies.
      Check for previous active window to bring to top.
   */
   if (Wnd)
   {
      WndTo = Wnd->head.pti->MessageQueue->spwndActivePrev;
      if (can_activate_window( WndTo )) goto done;
   }
 
   // Find any window to bring to top. Works Okay for wine since it does not see X11 windows.
   WndTo = UserGetDesktopWindow();
   if ((WndTo == NULL) || (WndTo->spwndChild == NULL))
   {
      //ERR("WinPosActivateOtherWindow No window!\n");
      return;
   }
   WndTo = WndTo->spwndChild;
   for (;;)
   {
      if (WndTo == Wnd)
      {
         WndTo = NULL;
         break;
      }
      if (can_activate_window( WndTo )) goto done;
      if (!(WndTo = WndTo->spwndNext))  break;
   }
 
done:
   if (WndTo) UserRefObjectCo(WndTo, &Ref);
 
   if (gpqForeground && (!gpqForeground->spwndActive || Wnd == gpqForeground->spwndActive))
   {
      /* ReactOS can pass WndTo = NULL to co_IntSetForegroundWindow and returns FALSE. */
      //ERR("WinPosActivateOtherWindow Set FG 0x%p hWnd %p\n", WndTo, WndTo ? UserHMGetHandle(WndTo) : NULL);
      if (co_IntSetForegroundWindow(WndTo))
      {
         if (WndTo) UserDerefObjectCo(WndTo);
         return;
      }
   }
   //ERR("WinPosActivateOtherWindow Set Active  0x%p\n",WndTo);
   if (!UserSetActiveWindow(WndTo))  /* Ok for WndTo to be NULL here */
   {
      //ERR("WPAOW SA 1\n");
      UserSetActiveWindow(NULL);
   }
   if (WndTo) UserDerefObjectCo(WndTo);
}
 
VOID FASTCALL
WinPosInitInternalPos(PWND Wnd, RECTL *RestoreRect)
{
   POINT Size;
   RECTL Rect = *RestoreRect;
 
   if (Wnd->spwndParent && !UserIsDesktopWindow(Wnd->spwndParent))
   {
      RECTL_vOffsetRect(&Rect,
                        -Wnd->spwndParent->rcClient.left,
                        -Wnd->spwndParent->rcClient.top);
   }
 
   Size.x = Rect.left;
   Size.y = Rect.top;
 
   if (!Wnd->InternalPosInitialized)
   {
      // FIXME: Use check point Atom..
      Wnd->InternalPos.flags = 0;
      Wnd->InternalPos.MaxPos.x  = Wnd->InternalPos.MaxPos.y  = -1;
      Wnd->InternalPos.IconPos.x = Wnd->InternalPos.IconPos.y = -1;
      Wnd->InternalPos.NormalRect = Rect;
      Wnd->InternalPosInitialized = TRUE;
   }
 
   if (Wnd->style & WS_MINIMIZE)
   {
      Wnd->InternalPos.IconPos = Size;
      Wnd->InternalPos.flags |= WPF_MININIT;
   }
   else if (Wnd->style & WS_MAXIMIZE)
   {
      Wnd->InternalPos.flags |= WPF_MAXINIT;
 
      if ( Wnd->spwndParent == Wnd->head.rpdesk->pDeskInfo->spwnd )
      {
         if (Wnd->state & WNDS_MAXIMIZESTOMONITOR)
         {
            Wnd->InternalPos.flags &= ~WPF_MAXINIT;
            Wnd->InternalPos.MaxPos.x = Wnd->InternalPos.MaxPos.y = -1;
         }
         else
         {
            RECTL WorkArea;
            PMONITOR pmonitor = UserMonitorFromRect(&Rect, MONITOR_DEFAULTTOPRIMARY );
            // FIXME: support DPI aware, rcWorkDPI/Real etc..
            WorkArea = pmonitor->rcMonitor;
 
            if (Wnd->style & WS_MAXIMIZEBOX)
            {  // Support (Wnd->state & WNDS_HASCAPTION) || pmonitor->cFullScreen too.
               if ((Wnd->style & WS_CAPTION) == WS_CAPTION || !(Wnd->style & (WS_CHILD | WS_POPUP)))
               {
                  WorkArea = pmonitor->rcWork;
                  //ERR("rcWork\n");
               }
            }
 
            Wnd->InternalPos.MaxPos.x = Rect.left - WorkArea.left;
            Wnd->InternalPos.MaxPos.y = Rect.top  - WorkArea.top;
 
            /*ERR("WinPosIP 2 X %d = R.l %d - W.l %d | Y %d = R.t %d - W.t %d\n",
                                         Wnd->InternalPos.MaxPos.x,
                                         Rect.left, WorkArea.left,
                                         Wnd->InternalPos.MaxPos.y,
                                         Rect.top, WorkArea.top);*/
         }
      }
      else
         Wnd->InternalPos.MaxPos = Size;
   }
   else
   {
      /* Lie about the snap; Windows does this so applications don't save their
       * position as a snap but rather the unsnapped "real" position. */
      if (!IntIsWindowSnapped(Wnd) ||
          RECTL_bIsEmptyRect(&Wnd->InternalPos.NormalRect))
      {
         Wnd->InternalPos.NormalRect = Rect;
      }
   }
}
 
BOOL
FASTCALL
IntGetWindowPlacement(PWND Wnd, WINDOWPLACEMENT *lpwndpl)
{
   if (!Wnd) return FALSE;
 
   if(lpwndpl->length != sizeof(WINDOWPLACEMENT))
   {
      ERR("length mismatch: %u\n", lpwndpl->length);
      return FALSE;
   }
 
   lpwndpl->flags = 0;
 
   WinPosInitInternalPos(Wnd, &Wnd->rcWindow);
 
   lpwndpl->showCmd = SW_HIDE;
 
   if ( Wnd->style & WS_MINIMIZE )
      lpwndpl->showCmd = SW_SHOWMINIMIZED;
   else
      lpwndpl->showCmd = ( Wnd->style & WS_MAXIMIZE ) ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL ;
 
   lpwndpl->rcNormalPosition = Wnd->InternalPos.NormalRect;
 
   if (Wnd->InternalPos.flags & WPF_MININIT) // Return if it was set!
   {
      lpwndpl->ptMinPosition.x = Wnd->InternalPos.IconPos.x;
      lpwndpl->ptMinPosition.y = Wnd->InternalPos.IconPos.y;
   }
   else
      lpwndpl->ptMinPosition.x = lpwndpl->ptMinPosition.y = -1;
 
   if ( Wnd->InternalPos.flags & WPF_MAXINIT && // Return if set and not maximized to monitor!
        !(Wnd->state & WNDS_MAXIMIZESTOMONITOR))
   {
      lpwndpl->ptMaxPosition.x = Wnd->InternalPos.MaxPos.x;
      lpwndpl->ptMaxPosition.y = Wnd->InternalPos.MaxPos.y;
   }
   else
      lpwndpl->ptMaxPosition.x = lpwndpl->ptMaxPosition.y = -1;
 
   if ( Wnd->spwndParent == Wnd->head.rpdesk->pDeskInfo->spwnd &&
       !(Wnd->ExStyle & WS_EX_TOOLWINDOW))
   {
      PMONITOR pmonitor = UserMonitorFromRect(&lpwndpl->rcNormalPosition, MONITOR_DEFAULTTOPRIMARY );
 
      // FIXME: support DPI aware, rcWorkDPI/Real etc..
      if (Wnd->InternalPos.flags & WPF_MININIT)
      {
         lpwndpl->ptMinPosition.x -= (pmonitor->rcWork.left - pmonitor->rcMonitor.left);
         lpwndpl->ptMinPosition.y -= (pmonitor->rcWork.top - pmonitor->rcMonitor.top);
      }
      RECTL_vOffsetRect(&lpwndpl->rcNormalPosition,
                         pmonitor->rcMonitor.left - pmonitor->rcWork.left,
                         pmonitor->rcMonitor.top  - pmonitor->rcWork.top);
   }
 
   if ( Wnd->InternalPos.flags & WPF_RESTORETOMAXIMIZED || Wnd->style & WS_MAXIMIZE )
      lpwndpl->flags |= WPF_RESTORETOMAXIMIZED;
 
   if ( ((Wnd->style & (WS_CHILD|WS_POPUP)) == WS_CHILD) && Wnd->InternalPos.flags & WPF_SETMINPOSITION)
      lpwndpl->flags |= WPF_SETMINPOSITION;
 
   return TRUE;
}
 
/* make sure the specified rect is visible on screen */
static void make_rect_onscreen( RECT *rect )
{
    PMONITOR pmonitor = UserMonitorFromRect( rect, MONITOR_DEFAULTTONEAREST ); // Wine uses this.
 
    //  FIXME: support DPI aware, rcWorkDPI/Real etc..
    if (!pmonitor) return;
    /* FIXME: map coordinates from rcWork to rcMonitor */
    if (rect->right <= pmonitor->rcWork.left)
    {
        rect->right += pmonitor->rcWork.left - rect->left;
        rect->left = pmonitor->rcWork.left;
    }
    else if (rect->left >= pmonitor->rcWork.right)
    {
        rect->left += pmonitor->rcWork.right - rect->right;
        rect->right = pmonitor->rcWork.right;
    }
    if (rect->bottom <= pmonitor->rcWork.top)
    {
        rect->bottom += pmonitor->rcWork.top - rect->top;
        rect->top = pmonitor->rcWork.top;
    }
    else if (rect->top >= pmonitor->rcWork.bottom)
    {
        rect->top += pmonitor->rcWork.bottom - rect->bottom;
        rect->bottom = pmonitor->rcWork.bottom;
    }
}
 
/* make sure the specified point is visible on screen */
static void make_point_onscreen( POINT *pt )
{
    RECT rect;
 
    RECTL_vSetRect( &rect, pt->x, pt->y, pt->x + 1, pt->y + 1 );
    make_rect_onscreen( &rect );
    pt->x = rect.left;
    pt->y = rect.top;
}
 
BOOL FASTCALL
IntSetWindowPlacement(PWND Wnd, WINDOWPLACEMENT *wpl, UINT Flags)
{
   BOOL sAsync;
   UINT SWP_Flags;
 
   if ( Flags & PLACE_MIN) make_point_onscreen( &wpl->ptMinPosition );
   if ( Flags & PLACE_MAX) make_point_onscreen( &wpl->ptMaxPosition );
   if ( Flags & PLACE_RECT) make_rect_onscreen( &wpl->rcNormalPosition );
 
   if (!Wnd || Wnd == Wnd->head.rpdesk->pDeskInfo->spwnd) return FALSE;
 
   if ( Flags & PLACE_MIN ) Wnd->InternalPos.IconPos = wpl->ptMinPosition;
   if ( Flags & PLACE_MAX ) Wnd->InternalPos.MaxPos = wpl->ptMaxPosition;
   if ( Flags & PLACE_RECT) Wnd->InternalPos.NormalRect = wpl->rcNormalPosition;
 
   SWP_Flags = SWP_NOZORDER | SWP_NOACTIVATE | ((wpl->flags & WPF_ASYNCWINDOWPLACEMENT) ? SWP_ASYNCWINDOWPOS : 0);
 
   if (Wnd->style & WS_MINIMIZE )
   {
      if (Flags & PLACE_MIN || Wnd->InternalPos.flags & WPF_SETMINPOSITION)
      {
         co_WinPosSetWindowPos(Wnd, HWND_TOP,
                               wpl->ptMinPosition.x, wpl->ptMinPosition.y, 0, 0,
                               SWP_NOSIZE | SWP_Flags);
         Wnd->InternalPos.flags |= WPF_MININIT;
      }
   }
   else if (Wnd->style & WS_MAXIMIZE )
   {
      if (Flags & PLACE_MAX)
      {
         co_WinPosSetWindowPos(Wnd, HWND_TOP,
                               wpl->ptMaxPosition.x, wpl->ptMaxPosition.y, 0, 0,
                               SWP_NOSIZE | SWP_Flags);
         Wnd->InternalPos.flags |= WPF_MAXINIT;
      }
   }
   else if (Flags & PLACE_RECT)
   {
      co_WinPosSetWindowPos(Wnd, HWND_TOP,
                            wpl->rcNormalPosition.left, wpl->rcNormalPosition.top,
                            wpl->rcNormalPosition.right - wpl->rcNormalPosition.left,
                            wpl->rcNormalPosition.bottom - wpl->rcNormalPosition.top,
                            SWP_Flags);
   }
 
   sAsync = (Wnd->head.pti->MessageQueue != gptiCurrent->MessageQueue && wpl->flags & WPF_ASYNCWINDOWPLACEMENT);
 
   if ( sAsync )
      co_IntSendMessageNoWait( UserHMGetHandle(Wnd), WM_ASYNC_SHOWWINDOW, wpl->showCmd, 0 );
   else
      co_WinPosShowWindow(Wnd, wpl->showCmd);
 
   if ( Wnd->style & WS_MINIMIZE && !sAsync )
   {
      if ( wpl->flags & WPF_SETMINPOSITION )
         Wnd->InternalPos.flags |= WPF_SETMINPOSITION;
 
      if ( wpl->flags & WPF_RESTORETOMAXIMIZED )
         Wnd->InternalPos.flags |= WPF_RESTORETOMAXIMIZED;
   }
   return TRUE;
}
 
UINT
FASTCALL
co_WinPosArrangeIconicWindows(PWND parent)
{
   RECTL rectParent;
   PWND Child;
   INT x, y, xspacing, yspacing, sx, sy;
 
   ASSERT_REFS_CO(parent);
 
   IntGetClientRect( parent, &rectParent );
   // FIXME: Support Minimize Metrics gspv.mm.iArrange.
   // Default: ARW_BOTTOMLEFT
   x = rectParent.left;
   y = rectParent.bottom;
 
   xspacing = UserGetSystemMetrics(SM_CXMINIMIZED);
   yspacing = UserGetSystemMetrics(SM_CYMINIMIZED);
 
   Child = parent->spwndChild;
   while(Child)
   {
      if((Child->style & WS_MINIMIZE) != 0 )
      {
         USER_REFERENCE_ENTRY Ref;
         UserRefObjectCo(Child, &Ref);
 
         sx = x + UserGetSystemMetrics(SM_CXBORDER);
         sy = y - yspacing - UserGetSystemMetrics(SM_CYBORDER);
 
         Child->InternalPos.IconPos.x = sx;
         Child->InternalPos.IconPos.y = sy;
         Child->InternalPos.flags |= WPF_MININIT;
 
         co_WinPosSetWindowPos( Child, 0, sx, sy, xspacing, yspacing, SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOCOPYBITS | SWP_ASYNCWINDOWPOS);
 
         UserDerefObjectCo(Child);
 
         if (x <= rectParent.right - xspacing)
            x += xspacing;
         else
         {
            x = rectParent.left;
            y -= yspacing;
         }
      }
      Child = Child->spwndNext;
   }
   return yspacing;
}
 
static VOID FASTCALL
WinPosFindIconPos(PWND Window, POINT *Pos)
{
   RECT rectParent;
   PWND pwndChild, pwndParent;
   int x, y, xspacing, yspacing;
 
   pwndParent = Window->spwndParent;
   if (UserIsDesktopWindow(pwndParent))
   {
      ERR("FIXME: Parent is Desktop, Min off screen!\n");
      /* FIXME: ReactOS doesn't support iconic minimize to desktop */
      Pos->x = Pos->y = -32000;
      Window->InternalPos.flags |= WPF_MININIT;
      Window->InternalPos.IconPos.x = Pos->x;
      Window->InternalPos.IconPos.y = Pos->y;
      return;
   }
 
   IntGetClientRect( pwndParent, &rectParent );
   // FIXME: Support Minimize Metrics gspv.mm.iArrange.
   // Default: ARW_BOTTOMLEFT
   x = rectParent.left;
   y = rectParent.bottom;
 
   xspacing = UserGetSystemMetrics(SM_CXMINIMIZED);
   yspacing = UserGetSystemMetrics(SM_CYMINIMIZED);
 
   // Set to default position when minimized.
   Pos->x = x + UserGetSystemMetrics(SM_CXBORDER);
   Pos->y = y - yspacing - UserGetSystemMetrics(SM_CYBORDER);
 
   for (pwndChild = pwndParent->spwndChild; pwndChild; pwndChild = pwndChild->spwndNext)
   {
        if (pwndChild == Window) continue;
 
        if ((pwndChild->style & (WS_VISIBLE|WS_MINIMIZE)) != (WS_VISIBLE|WS_MINIMIZE) )
        {
            continue;
        }
 
        if ( pwndChild->InternalPos.IconPos.x != Pos->x && pwndChild->InternalPos.IconPos.y != Pos->y )
        {
           break;
        }
        if (x <= rectParent.right - xspacing)
            x += xspacing;
        else
        {
            x = rectParent.left;
            y -= yspacing;
        }
        Pos->x = x + UserGetSystemMetrics(SM_CXBORDER);
        Pos->y = y - yspacing - UserGetSystemMetrics(SM_CYBORDER);
   }
 
   Window->InternalPos.IconPos.x = Pos->x;
   Window->InternalPos.IconPos.y = Pos->y;
   Window->InternalPos.flags |= WPF_MININIT;
   TRACE("Position is set! X:%d Y:%d\n",Pos->x,Pos->y);
   return;
}
 
BOOL
UserHasWindowEdge(DWORD Style, DWORD ExStyle)
{
   if (Style & WS_MINIMIZE)
      return TRUE;
   if (ExStyle & WS_EX_DLGMODALFRAME)
      return TRUE;
   if (ExStyle & WS_EX_STATICEDGE)
      return FALSE;
   if (Style & WS_THICKFRAME)
      return TRUE;
   Style &= WS_CAPTION;
   if (Style == WS_DLGFRAME || Style == WS_CAPTION)
      return TRUE;
   return FALSE;
}
 
VOID FASTCALL
IntGetWindowBorderMeasures(PWND Wnd, UINT *cx, UINT *cy)
{
   if(HAS_DLGFRAME(Wnd->style, Wnd->ExStyle) && !(Wnd->style & WS_MINIMIZE))
   {
      *cx = UserGetSystemMetrics(SM_CXDLGFRAME);
      *cy = UserGetSystemMetrics(SM_CYDLGFRAME);
   }
   else
   {
      if(HAS_THICKFRAME(Wnd->style, Wnd->ExStyle)&& !(Wnd->style & WS_MINIMIZE))
      {
         *cx = UserGetSystemMetrics(SM_CXFRAME);
         *cy = UserGetSystemMetrics(SM_CYFRAME);
      }
      else if(HAS_THINFRAME(Wnd->style, Wnd->ExStyle))
      {
         *cx = UserGetSystemMetrics(SM_CXBORDER);
         *cy = UserGetSystemMetrics(SM_CYBORDER);
      }
      else
      {
         *cx = *cy = 0;
      }
   }
}
 
VOID
UserGetWindowBorders(DWORD Style, DWORD ExStyle, SIZE *Size, BOOL WithClient)
{
   DWORD Border = 0;
 
   if (UserHasWindowEdge(Style, ExStyle))
      Border += 2;
   else if ((ExStyle & (WS_EX_STATICEDGE|WS_EX_DLGMODALFRAME)) == WS_EX_STATICEDGE)
      Border += 1; /* for the outer frame always present */
   if ((ExStyle & WS_EX_CLIENTEDGE) && WithClient)
      Border += 2;
   if (Style & WS_CAPTION || ExStyle & WS_EX_DLGMODALFRAME)
      Border ++; /* The other border */
   Size->cx = Size->cy = Border;
   if ((Style & WS_THICKFRAME) && !(Style & WS_MINIMIZE)) /* The resize border */
   {
      Size->cx += UserGetSystemMetrics(SM_CXFRAME) - UserGetSystemMetrics(SM_CXDLGFRAME);
      Size->cy += UserGetSystemMetrics(SM_CYFRAME) - UserGetSystemMetrics(SM_CYDLGFRAME);
   }
   Size->cx *= UserGetSystemMetrics(SM_CXBORDER);
   Size->cy *= UserGetSystemMetrics(SM_CYBORDER);
}
 
//
// Fix CORE-5177
// See winetests:user32:win.c:wine_AdjustWindowRectEx, 
// Simplified version.
//
DWORD IntGetWindowBorders(DWORD Style, DWORD ExStyle)
{
    DWORD adjust = 0;
 
    if ( ExStyle & WS_EX_WINDOWEDGE )      // 1st
        adjust = 2; /* outer */
    else if ( ExStyle & WS_EX_STATICEDGE ) // 2nd
        adjust = 1; /* for the outer frame always present */
 
    if (ExStyle & WS_EX_CLIENTEDGE)
       adjust += 2;
 
    if ( Style & WS_CAPTION || ExStyle & WS_EX_DLGMODALFRAME )
        adjust++; /* The other border */
 
    return adjust;
}
 
UINT FASTCALL
co_WinPosGetMinMaxInfo(PWND Window, POINT* MaxSize, POINT* MaxPos,
                       POINT* MinTrack, POINT* MaxTrack)
{
    MINMAXINFO MinMax;
    PMONITOR monitor;
    INT xinc, yinc;
    LONG style = Window->style;
    LONG adjustedStyle;
    LONG exstyle = Window->ExStyle;
    RECT rc;
    DWORD adjust;
 
    ASSERT_REFS_CO(Window);
 
    /* Compute default values */
 
    rc = Window->rcWindow;
    MinMax.ptReserved.x = rc.left;
    MinMax.ptReserved.y = rc.top;
 
    if ((style & WS_CAPTION) == WS_CAPTION)
        adjustedStyle = style & ~WS_BORDER; /* WS_CAPTION = WS_DLGFRAME | WS_BORDER */
    else
        adjustedStyle = style;
 
    if (Window->spwndParent)
        IntGetClientRect(Window->spwndParent, &rc);
 
    adjust = IntGetWindowBorders(adjustedStyle, exstyle);
 
    // Handle special case while maximized. CORE-15893
    if ((adjustedStyle & WS_THICKFRAME) && !(adjustedStyle & WS_CHILD) && !(adjustedStyle & WS_MINIMIZE))
         adjust += 1;
 
    xinc = yinc = adjust;
 
    if ((adjustedStyle & WS_THICKFRAME) && (adjustedStyle & WS_CHILD) && !(adjustedStyle & WS_MINIMIZE))
    {
        xinc += UserGetSystemMetrics(SM_CXFRAME) - UserGetSystemMetrics(SM_CXDLGFRAME);
        yinc += UserGetSystemMetrics(SM_CYFRAME) - UserGetSystemMetrics(SM_CYDLGFRAME);
    }
 
    RECTL_vInflateRect( &rc,
                        xinc * UserGetSystemMetrics(SM_CXBORDER),
                        yinc * UserGetSystemMetrics(SM_CYBORDER) );
 
    xinc = -rc.left;
    yinc = -rc.top;
 
    MinMax.ptMaxSize.x = rc.right - rc.left;
    MinMax.ptMaxSize.y = rc.bottom - rc.top;
    if (style & (WS_DLGFRAME | WS_BORDER))
    {
        MinMax.ptMinTrackSize.x = UserGetSystemMetrics(SM_CXMINTRACK);
        MinMax.ptMinTrackSize.y = UserGetSystemMetrics(SM_CYMINTRACK);
    }
    else
    {
        MinMax.ptMinTrackSize.x = 2 * xinc;
        MinMax.ptMinTrackSize.y = 2 * yinc;
    }
    MinMax.ptMaxTrackSize.x = UserGetSystemMetrics(SM_CXMAXTRACK);
    MinMax.ptMaxTrackSize.y = UserGetSystemMetrics(SM_CYMAXTRACK);
    MinMax.ptMaxPosition.x = -xinc;
    MinMax.ptMaxPosition.y = -yinc;
 
    if (!EMPTYPOINT(Window->InternalPos.MaxPos)) MinMax.ptMaxPosition = Window->InternalPos.MaxPos;
 
    co_IntSendMessage(UserHMGetHandle(Window), WM_GETMINMAXINFO, 0, (LPARAM)&MinMax);
 
    /* if the app didn't change the values, adapt them for the current monitor */
    if ((monitor = UserGetPrimaryMonitor()))
    {
        RECT rc_work;
 
        rc_work = monitor->rcMonitor;
 
        if (style & WS_MAXIMIZEBOX)
        {
            if ((style & WS_CAPTION) == WS_CAPTION || !(style & (WS_CHILD | WS_POPUP)))
               rc_work = monitor->rcWork;
        }
 
        if (MinMax.ptMaxSize.x == UserGetSystemMetrics(SM_CXSCREEN) + 2 * xinc &&
            MinMax.ptMaxSize.y == UserGetSystemMetrics(SM_CYSCREEN) + 2 * yinc)
        {
            MinMax.ptMaxSize.x = (rc_work.right - rc_work.left) + 2 * xinc;
            MinMax.ptMaxSize.y = (rc_work.bottom - rc_work.top) + 2 * yinc;
        }
        if (MinMax.ptMaxPosition.x == -xinc && MinMax.ptMaxPosition.y == -yinc)
        {
            MinMax.ptMaxPosition.x = rc_work.left - xinc;
            MinMax.ptMaxPosition.y = rc_work.top - yinc;
        }
        if (MinMax.ptMaxSize.x >= (monitor->rcMonitor.right - monitor->rcMonitor.left) &&
            MinMax.ptMaxSize.y >= (monitor->rcMonitor.bottom - monitor->rcMonitor.top) )
        {
            Window->state |= WNDS_MAXIMIZESTOMONITOR;
        }
        else
            Window->state &= ~WNDS_MAXIMIZESTOMONITOR;
    }
 
 
    MinMax.ptMaxTrackSize.x = max(MinMax.ptMaxTrackSize.x,
                                  MinMax.ptMinTrackSize.x);
    MinMax.ptMaxTrackSize.y = max(MinMax.ptMaxTrackSize.y,
                                  MinMax.ptMinTrackSize.y);
 
    if (MaxSize)
       *MaxSize = MinMax.ptMaxSize;
    if (MaxPos)
       *MaxPos = MinMax.ptMaxPosition;
    if (MinTrack)
       *MinTrack = MinMax.ptMinTrackSize;
    if (MaxTrack)
       *MaxTrack = MinMax.ptMaxTrackSize;
 
    return 0; // FIXME: What does it return? Wine returns MINMAXINFO.
}
 
static
BOOL
IntValidateParent(PWND Child, PREGION ValidateRgn)
{
   PWND ParentWnd = Child->spwndParent;
 
   while (ParentWnd)
   {
      if (ParentWnd->style & WS_CLIPCHILDREN)
         break;
 
      if (ParentWnd->hrgnUpdate != 0)
      {
         IntInvalidateWindows( ParentWnd,
                               ValidateRgn,
                               RDW_VALIDATE | RDW_NOCHILDREN);
      }
 
      ParentWnd = ParentWnd->spwndParent;
   }
 
   return TRUE;
}
 
static
VOID FASTCALL
FixClientRect(PRECTL ClientRect, PRECTL WindowRect)
{
   if (ClientRect->left < WindowRect->left)
   {
      ClientRect->left = WindowRect->left;
   }
   else if (WindowRect->right < ClientRect->left)
   {
      ClientRect->left = WindowRect->right;
   }
   if (ClientRect->right < WindowRect->left)
   {
      ClientRect->right = WindowRect->left;
   }
   else if (WindowRect->right < ClientRect->right)
   {
      ClientRect->right = WindowRect->right;
   }
   if (ClientRect->top < WindowRect->top)
   {
      ClientRect->top = WindowRect->top;
   }
   else if (WindowRect->bottom < ClientRect->top)
   {
      ClientRect->top = WindowRect->bottom;
   }
   if (ClientRect->bottom < WindowRect->top)
   {
      ClientRect->bottom = WindowRect->top;
   }
   else if (WindowRect->bottom < ClientRect->bottom)
   {
      ClientRect->bottom = WindowRect->bottom;
   }
}
/***********************************************************************
 *           get_valid_rects
 *
 * Compute the valid rects from the old and new client rect and WVR_* flags.
 * Helper for WM_NCCALCSIZE handling.
 */
static
VOID FASTCALL
get_valid_rects( RECTL *old_client, RECTL *new_client, UINT flags, RECTL *valid )
{
    int cx, cy;
 
    if (flags & WVR_REDRAW)
    {
        RECTL_vSetEmptyRect( &valid[0] );
        RECTL_vSetEmptyRect( &valid[1] );
        return;
    }
 
    if (flags & WVR_VALIDRECTS)
    {
        if (!RECTL_bIntersectRect( &valid[0], &valid[0], new_client ) ||
            !RECTL_bIntersectRect( &valid[1], &valid[1], old_client ))
        {
            RECTL_vSetEmptyRect( &valid[0] );
            RECTL_vSetEmptyRect( &valid[1] );
            return;
        }
        flags = WVR_ALIGNLEFT | WVR_ALIGNTOP;
    }
    else
    {
        valid[0] = *new_client;
        valid[1] = *old_client;
    }
 
    /* make sure the rectangles have the same size */
    cx = min( valid[0].right - valid[0].left, valid[1].right - valid[1].left );
    cy = min( valid[0].bottom - valid[0].top, valid[1].bottom - valid[1].top );
 
    if (flags & WVR_ALIGNBOTTOM)
    {
        valid[0].top = valid[0].bottom - cy;
        valid[1].top = valid[1].bottom - cy;
    }
    else
    {
        valid[0].bottom = valid[0].top + cy;
        valid[1].bottom = valid[1].top + cy;
    }
    if (flags & WVR_ALIGNRIGHT)
    {
        valid[0].left = valid[0].right - cx;
        valid[1].left = valid[1].right - cx;
    }
    else
    {
        valid[0].right = valid[0].left + cx;
        valid[1].right = valid[1].left + cx;
    }
}
 
static
LONG FASTCALL
co_WinPosDoNCCALCSize(PWND Window, PWINDOWPOS WinPos, RECTL* WindowRect, RECTL* ClientRect, RECTL* validRects)
{
   PWND Parent;
   UINT wvrFlags = 0;
 
   ASSERT_REFS_CO(Window);
 
   /* Send WM_NCCALCSIZE message to get new client area */
   if ((WinPos->flags & (SWP_FRAMECHANGED | SWP_NOSIZE)) != SWP_NOSIZE)
   {
      NCCALCSIZE_PARAMS params;
      WINDOWPOS winposCopy;
 
      params.rgrc[0] = *WindowRect;      // new coordinates of a window that has been moved or resized
      params.rgrc[1] = Window->rcWindow; // window before it was moved or resized
      params.rgrc[2] = Window->rcClient; // client area before the window was moved or resized
 
      Parent = Window->spwndParent;
      if (0 != (Window->style & WS_CHILD) && Parent)
      {
         RECTL_vOffsetRect(&(params.rgrc[0]), - Parent->rcClient.left, - Parent->rcClient.top);
         RECTL_vOffsetRect(&(params.rgrc[1]), - Parent->rcClient.left, - Parent->rcClient.top);
         RECTL_vOffsetRect(&(params.rgrc[2]), - Parent->rcClient.left, - Parent->rcClient.top);
      }
 
      params.lppos = &winposCopy;
      winposCopy = *WinPos;
 
      wvrFlags = co_IntSendMessage(UserHMGetHandle(Window), WM_NCCALCSIZE, TRUE, (LPARAM)&params);
 
      /* If the application send back garbage, ignore it */
      if (params.rgrc[0].left <= params.rgrc[0].right &&
          params.rgrc[0].top <= params.rgrc[0].bottom)
      {
         *ClientRect = params.rgrc[0]; // First rectangle contains the coordinates of the new client rectangle resulting from the move or resize
         if ((Window->style & WS_CHILD) && Parent)
         {
            RECTL_vOffsetRect(ClientRect, Parent->rcClient.left, Parent->rcClient.top);
         }
         FixClientRect(ClientRect, WindowRect);
      }
 
      if (ClientRect->left != Window->rcClient.left ||
          ClientRect->top != Window->rcClient.top)
      {
         WinPos->flags &= ~SWP_NOCLIENTMOVE;
      }
 
      if (ClientRect->right - ClientRect->left != Window->rcClient.right - Window->rcClient.left)
      {
         WinPos->flags &= ~SWP_NOCLIENTSIZE;
      }
      else
         wvrFlags &= ~WVR_HREDRAW;
 
      if (ClientRect->bottom - ClientRect->top != Window->rcClient.bottom - Window->rcClient.top)
      {
         WinPos->flags &= ~SWP_NOCLIENTSIZE;
      }
      else
         wvrFlags &= ~WVR_VREDRAW;
 
      validRects[0] = params.rgrc[1]; // second rectangle contains the valid destination rectangle
      validRects[1] = params.rgrc[2]; // third rectangle contains the valid source rectangle
   }
   else
   {
      if (!(WinPos->flags & SWP_NOMOVE) &&
          (ClientRect->left != Window->rcClient.left ||
           ClientRect->top != Window->rcClient.top))
      {
         WinPos->flags &= ~SWP_NOCLIENTMOVE;
      }
   }
 
   if (WinPos->flags & (SWP_NOCOPYBITS | SWP_NOREDRAW | SWP_SHOWWINDOW | SWP_HIDEWINDOW))
   {
      RECTL_vSetEmptyRect( &validRects[0] );
      RECTL_vSetEmptyRect( &validRects[1] );
   }
   else get_valid_rects( &Window->rcClient, ClientRect, wvrFlags, validRects );
 
   return wvrFlags;
}
 
static
BOOL FASTCALL
co_WinPosDoWinPosChanging(PWND Window,
                          PWINDOWPOS WinPos,
                          PRECTL WindowRect,
                          PRECTL ClientRect)
{
   ASSERT_REFS_CO(Window);
 
   /* Send WM_WINDOWPOSCHANGING message */
 
   if (!(WinPos->flags & SWP_NOSENDCHANGING)
          && !((WinPos->flags & SWP_AGG_NOCLIENTCHANGE) && (WinPos->flags & SWP_SHOWWINDOW)))
   {
      TRACE("Sending WM_WINDOWPOSCHANGING to hwnd %p flags %04x.\n", UserHMGetHandle(Window), WinPos->flags);
      co_IntSendMessage(UserHMGetHandle(Window), WM_WINDOWPOSCHANGING, 0, (LPARAM)WinPos);
   }
 
   /* Calculate new position and size */
 
   *WindowRect = Window->rcWindow;
   *ClientRect = (Window->style & WS_MINIMIZE) ? Window->rcWindow : Window->rcClient;
 
   if (!(WinPos->flags & SWP_NOSIZE))
   {
      if (Window->style & WS_MINIMIZE)
      {
         WindowRect->right  = WindowRect->left + UserGetSystemMetrics(SM_CXMINIMIZED);
         WindowRect->bottom = WindowRect->top  + UserGetSystemMetrics(SM_CYMINIMIZED);
      }
      else
      {
         WindowRect->right = WindowRect->left + WinPos->cx;
         WindowRect->bottom = WindowRect->top + WinPos->cy;
      }
   }
 
   if (!(WinPos->flags & SWP_NOMOVE))
   {
      INT X, Y;
      PWND Parent;
      X = WinPos->x;
      Y = WinPos->y;
 
      Parent = Window->spwndParent;
 
      // Parent child position issue is in here. SetParent_W7 test CORE-6651.
      if (//((Window->style & WS_CHILD) != 0) && <- Fixes wine msg test_SetParent: "rects do not match", the last test.
           Parent &&
           Parent != Window->head.rpdesk->pDeskInfo->spwnd)
      {
         TRACE("Not SWP_NOMOVE 1 Parent client offset X %d Y %d\n",X,Y);
         X += Parent->rcClient.left;
         Y += Parent->rcClient.top;
         TRACE("Not SWP_NOMOVE 2 Parent client offset X %d Y %d\n",X,Y);
      }
 
      WindowRect->left    = X;
      WindowRect->top     = Y;
      WindowRect->right  += X - Window->rcWindow.left;
      WindowRect->bottom += Y - Window->rcWindow.top;
 
      RECTL_vOffsetRect(ClientRect, X - Window->rcWindow.left,
                                    Y - Window->rcWindow.top);
   }
   WinPos->flags |= SWP_NOCLIENTMOVE | SWP_NOCLIENTSIZE;
 
   TRACE( "hwnd %p, after %p, swp %d,%d %dx%d flags %08x\n",
           WinPos->hwnd, WinPos->hwndInsertAfter, WinPos->x, WinPos->y,
           WinPos->cx, WinPos->cy, WinPos->flags );
   TRACE("WindowRect: %d %d %d %d\n", WindowRect->left,WindowRect->top,WindowRect->right,WindowRect->bottom);
   TRACE("ClientRect: %d %d %d %d\n", ClientRect->left,ClientRect->top,ClientRect->right,ClientRect->bottom);
 
   return TRUE;
}
 
/*
 * Fix Z order taking into account owned popups -
 * basically we need to maintain them above the window that owns them
 *
 * FIXME: hide/show owned popups when owner visibility changes.
 *
 * ReactOS: See bug CORE-6129 and CORE-6554.
 *
 */
 // Pass all the win:test_children/popup_zorder tests except "move hwnd_F and its popups down" which is if'ed out.
 // Side effect, breaks more of the DeferWindowPos api tests, but wine breaks more!!!!
static
HWND FASTCALL
WinPosDoOwnedPopups(PWND Window, HWND hWndInsertAfter)
{
   HWND *List = NULL;
   HWND Owner;
   LONG Style;
   PWND DesktopWindow, ChildObject;
   int i;
 
   TRACE("(%p) hInsertAfter = %p\n", Window, hWndInsertAfter );
 
   Style = Window->style;
 
   if (Style & WS_CHILD)
   {
      TRACE("Window is child\n");
      return hWndInsertAfter;
   }
 
   Owner = (Window->spwndOwner ? UserHMGetHandle(Window->spwndOwner) : NULL);
 
   if (Owner)
   {
      /* Make sure this popup stays above the owner */
 
      if (hWndInsertAfter != HWND_TOPMOST)
      {
         DesktopWindow = UserGetDesktopWindow();
         List = IntWinListChildren(DesktopWindow);
 
         if (List != NULL)
         {
            for (i = 0; List[i]; i++)
            {
               BOOL topmost = FALSE;
 
               ChildObject = ValidateHwndNoErr(List[i]);
               if (ChildObject)
               {
                  topmost = (ChildObject->ExStyle & WS_EX_TOPMOST) != 0;
               }
 
               if (List[i] == Owner)
               {
                  /* We found its Owner, so we must handle it here. */
                  if (i > 0)
                  {
                     if (List[i - 1] != UserHMGetHandle(Window))
                     {
                        /*
                         * If the popup to be inserted is not already just
                         * before the Owner, insert it there. The modified
                         * hWndInsertAfter will be handled below.
                         *
                         * (NOTE: Do not allow hWndInsertAfter to become equal
                         * to the popup's window handle, as this would cause
                         * the popup to link to itself).
                         */
                        hWndInsertAfter = List[i - 1];
                     }
                     else
                     {
                        /* If the popup to be inserted is already
                         * before the Owner, we are done. */
                        ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
                        return hWndInsertAfter;
                     }
                  }
                  else
                  {
                     hWndInsertAfter = topmost ? HWND_TOPMOST : HWND_TOP;
                  }
                  break;
               }
 
               if (hWndInsertAfter == HWND_TOP || hWndInsertAfter ==  HWND_NOTOPMOST)
               {
                  if (!topmost) break;
               }
               else if (List[i] == hWndInsertAfter) break;
            }
         }
         else
            return hWndInsertAfter;
      }
   }
 
   if (hWndInsertAfter == HWND_BOTTOM)
   {
      ERR("Window is HWND_BOTTOM hwnd %p\n",hWndInsertAfter);
      if (List) ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
      goto done;
   }
 
   if (!List)
   {
      DesktopWindow = UserGetDesktopWindow();
      List = IntWinListChildren(DesktopWindow);
   }
 
   if (List != NULL)
   {
      i = 0;
 
      if (hWndInsertAfter == HWND_TOP || hWndInsertAfter == HWND_NOTOPMOST)
      {
         if (hWndInsertAfter == HWND_NOTOPMOST || !(Window->ExStyle & WS_EX_TOPMOST))
         {
            TRACE("skip all the topmost windows\n");
            /* skip all the topmost windows */
            while (List[i] &&
                   (ChildObject = ValidateHwndNoErr(List[i])) &&
                   (ChildObject->ExStyle & WS_EX_TOPMOST)) i++;
         }
      }
      else if (hWndInsertAfter != HWND_TOPMOST)
      {
        /* skip windows that are already placed correctly */
        for (i = 0; List[i]; i++)
        {
            if (List[i] == hWndInsertAfter) break;
            if (List[i] == UserHMGetHandle(Window))
            {
               ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
               goto done;  /* nothing to do if window is moving backwards in z-order */
            }
        }
      }
 
      for (; List[i]; i++)
      {
         PWND Wnd;
         USER_REFERENCE_ENTRY Ref;
 
         if (List[i] == UserHMGetHandle(Window))
            break;
 
         if (!(Wnd = ValidateHwndNoErr(List[i])))
            continue;
 
         Owner = (Wnd->spwndOwner ? UserHMGetHandle(Wnd->spwndOwner) : NULL);
 
         if (Owner != UserHMGetHandle(Window)) continue;
 
         UserRefObjectCo(Wnd, &Ref);
         TRACE( "moving %p owned by %p after %p\n", List[i], UserHMGetHandle(Window), hWndInsertAfter );
         co_WinPosSetWindowPos(Wnd, hWndInsertAfter, 0, 0, 0, 0,
                               SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOSENDCHANGING| SWP_DEFERERASE);
 
         UserDerefObjectCo(Wnd);
         hWndInsertAfter = List[i];
      }
      ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
   }
done:
   return hWndInsertAfter;
}
 
/***********************************************************************
 *      WinPosInternalMoveWindow
 *
 * Update WindowRect and ClientRect of Window and all of its children
 * We keep both WindowRect and ClientRect in screen coordinates internally
 */
static
VOID FASTCALL
WinPosInternalMoveWindow(PWND Window, INT MoveX, INT MoveY)
{
   PWND Child;
 
   ASSERT(Window != Window->spwndChild);
   TRACE("InternalMoveWin  X %d Y %d\n", MoveX, MoveY);
 
   Window->rcWindow.left += MoveX;
   Window->rcWindow.right += MoveX;
   Window->rcWindow.top += MoveY;
   Window->rcWindow.bottom += MoveY;
 
   Window->rcClient.left += MoveX;
   Window->rcClient.right += MoveX;
   Window->rcClient.top += MoveY;
   Window->rcClient.bottom += MoveY;
 
   for(Child = Window->spwndChild; Child; Child = Child->spwndNext)
   {
      WinPosInternalMoveWindow(Child, MoveX, MoveY);
   }
}
 
/*
 * WinPosFixupSWPFlags
 *
 * Fix redundant flags and values in the WINDOWPOS structure.
 */
static
BOOL FASTCALL
WinPosFixupFlags(WINDOWPOS *WinPos, PWND Wnd)
{
   PWND Parent;
   POINT pt;
 
   /* Finally make sure that all coordinates are valid */
   if (WinPos->x < -32768) WinPos->x = -32768;
   else if (WinPos->x > 32767) WinPos->x = 32767;
   if (WinPos->y < -32768) WinPos->y = -32768;
   else if (WinPos->y > 32767) WinPos->y = 32767;
 
   WinPos->cx = max(WinPos->cx, 0);
   WinPos->cy = max(WinPos->cy, 0);
 
   Parent = UserGetAncestor( Wnd, GA_PARENT );
   if (!IntIsWindowVisible( Parent ) &&
      /* Fix B : wine msg test_SetParent:WmSetParentSeq_2:25 wParam bits! */
       (WinPos->flags & SWP_AGG_STATUSFLAGS) == SWP_AGG_NOPOSCHANGE) WinPos->flags |= SWP_NOREDRAW;
 
   if (Wnd->style & WS_VISIBLE) WinPos->flags &= ~SWP_SHOWWINDOW;
   else
   {
      WinPos->flags &= ~SWP_HIDEWINDOW;
      if (!(WinPos->flags & SWP_SHOWWINDOW)) WinPos->flags |= SWP_NOREDRAW;
   }
 
   /* Check for right size */
   if (Wnd->rcWindow.right - Wnd->rcWindow.left == WinPos->cx &&
       Wnd->rcWindow.bottom - Wnd->rcWindow.top == WinPos->cy)
   {
      WinPos->flags |= SWP_NOSIZE;
   }
 
   pt.x = WinPos->x;
   pt.y = WinPos->y;
   IntClientToScreen( Parent, &pt );
   TRACE("WPFU C2S wpx %d wpy %d ptx %d pty %d\n",WinPos->x,WinPos->y,pt.x,pt.y);
   /* Check for right position */
   if (Wnd->rcWindow.left == pt.x && Wnd->rcWindow.top == pt.y)
   {
      //ERR("In right pos\n");
      WinPos->flags |= SWP_NOMOVE;
   }
 
   if ( WinPos->hwnd != UserGetForegroundWindow() && (Wnd->style & (WS_POPUP | WS_CHILD)) != WS_CHILD)
   {
      /* Bring to the top when activating */
      if (!(WinPos->flags & (SWP_NOACTIVATE|SWP_HIDEWINDOW)) &&
           (WinPos->flags & SWP_NOZORDER ||
           (WinPos->hwndInsertAfter != HWND_TOPMOST && WinPos->hwndInsertAfter != HWND_NOTOPMOST)))
      {
         WinPos->flags &= ~SWP_NOZORDER;
         WinPos->hwndInsertAfter = (0 != (Wnd->ExStyle & WS_EX_TOPMOST) ? HWND_TOPMOST : HWND_TOP);
      }
   }
 
   /* Check hwndInsertAfter */
   if (!(WinPos->flags & SWP_NOZORDER))
   {
      /* Fix sign extension */
      if (WinPos->hwndInsertAfter == (HWND)0xffff)
      {
         WinPos->hwndInsertAfter = HWND_TOPMOST;
      }
      else if (WinPos->hwndInsertAfter == (HWND)0xfffe)
      {
         WinPos->hwndInsertAfter = HWND_NOTOPMOST;
      }
 
      if (WinPos->hwndInsertAfter == HWND_TOP)
      {
         /* Keep it topmost when it's already topmost */
         if ((Wnd->ExStyle & WS_EX_TOPMOST) != 0)
            WinPos->hwndInsertAfter = HWND_TOPMOST;
 
         if (IntGetWindow(WinPos->hwnd, GW_HWNDFIRST) == WinPos->hwnd)
         {
            WinPos->flags |= SWP_NOZORDER;
         }
      }
      else if (WinPos->hwndInsertAfter == HWND_BOTTOM)
      {
         if (!(Wnd->ExStyle & WS_EX_TOPMOST) && IntGetWindow(WinPos->hwnd, GW_HWNDLAST) == WinPos->hwnd)
            WinPos->flags |= SWP_NOZORDER;
      }
      else if (WinPos->hwndInsertAfter == HWND_TOPMOST)
      {
          if ((Wnd->ExStyle & WS_EX_TOPMOST) && IntGetWindow(WinPos->hwnd, GW_HWNDFIRST) == WinPos->hwnd)
             WinPos->flags |= SWP_NOZORDER;
      }
      else if (WinPos->hwndInsertAfter == HWND_NOTOPMOST)
      {
         if (!(Wnd->ExStyle & WS_EX_TOPMOST))
            WinPos->flags |= SWP_NOZORDER;
      }
      else /* hwndInsertAfter must be a sibling of the window */
      {
         PWND InsAfterWnd;
 
         InsAfterWnd = ValidateHwndNoErr(WinPos->hwndInsertAfter);
         if(!InsAfterWnd)
         {
             return TRUE;
         }
 
         if (InsAfterWnd->spwndParent != Wnd->spwndParent)
         {
            /* Note from wine User32 Win test_SetWindowPos:
               "Returns TRUE also for windows that are not siblings"
               "Does not seem to do anything even without passing flags, still returns TRUE"
               "Same thing the other way around."
               ".. and with these windows."
             */
            return FALSE;
         }
         else
         {
            /*
             * We don't need to change the Z order of hwnd if it's already
             * inserted after hwndInsertAfter or when inserting hwnd after
             * itself.
             */
            if ((WinPos->hwnd == WinPos->hwndInsertAfter) ||
                ((InsAfterWnd->spwndNext) && (WinPos->hwnd == UserHMGetHandle(InsAfterWnd->spwndNext))))
            {
               WinPos->flags |= SWP_NOZORDER;
            }
         }
      }
   }
 
   return TRUE;
}
 
//
// This is a NC HACK fix for forcing painting of non client areas.
// Further troubleshooting in painting.c is required to remove this hack.
// See CORE-7166 & CORE-15934
//
VOID
ForceNCPaintErase(PWND Wnd, HRGN hRgn, PREGION pRgn)
{
   HDC hDC;
   PREGION RgnUpdate;
   UINT RgnType;
   BOOL Create = FALSE;
 
   if (Wnd->hrgnUpdate == NULL)
   {
       Wnd->hrgnUpdate = NtGdiCreateRectRgn(0, 0, 0, 0);
       IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_PUBLIC);
       Create = TRUE;
   }
 
   if (Wnd->hrgnUpdate != HRGN_WINDOW)
   {
       RgnUpdate = REGION_LockRgn(Wnd->hrgnUpdate);
       if (RgnUpdate)
       {
           RgnType = IntGdiCombineRgn(RgnUpdate, RgnUpdate, pRgn, RGN_OR);
           REGION_UnlockRgn(RgnUpdate);
           if (RgnType == NULLREGION)
           {
               IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
               GreDeleteObject(Wnd->hrgnUpdate);
               Wnd->hrgnUpdate = NULL;
               Create = FALSE;
           }
       }
   }
 
   IntSendNCPaint( Wnd, hRgn ); // Region can be deleted by the application.
 
   if (Wnd->hrgnUpdate)
   {
       hDC = UserGetDCEx( Wnd,
                          Wnd->hrgnUpdate,
                          DCX_CACHE|DCX_USESTYLE|DCX_INTERSECTRGN|DCX_KEEPCLIPRGN);
 
      Wnd->state &= ~(WNDS_SENDERASEBACKGROUND|WNDS_ERASEBACKGROUND);
      // Kill the loop, so Clear before we send.
      if (!co_IntSendMessage(UserHMGetHandle(Wnd), WM_ERASEBKGND, (WPARAM)hDC, 0))
      {
          Wnd->state |= (WNDS_SENDERASEBACKGROUND|WNDS_ERASEBACKGROUND);
      }
      UserReleaseDC(Wnd, hDC, FALSE);
   }
 
   if (Create)
   {
      IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
      GreDeleteObject(Wnd->hrgnUpdate);
      Wnd->hrgnUpdate = NULL;
   }
}
 
static VOID FASTCALL IntImeWindowPosChanged(VOID)
{
    HWND *phwnd;
    PWND pwndNode, pwndDesktop = UserGetDesktopWindow();
    PWINDOWLIST pWL;
    USER_REFERENCE_ENTRY Ref;
 
    if (!pwndDesktop)
        return;
 
    /* Enumerate the windows to get the IME windows (of default and non-default) */
    pWL = IntBuildHwndList(pwndDesktop->spwndChild, IACE_LIST, gptiCurrent);
    if (!pWL)
        return;
 
    for (phwnd = pWL->ahwnd; *phwnd != HWND_TERMINATOR; ++phwnd)
    {
        if (gptiCurrent->TIF_flags & TIF_INCLEANUP)
            break;
 
        pwndNode = ValidateHwndNoErr(*phwnd);
        if (pwndNode == NULL ||
            pwndNode->head.pti != gptiCurrent ||
            pwndNode->pcls->atomClassName != gpsi->atomSysClass[ICLS_IME])
        {
            continue;
        }
 
        /* Now hwndNode is an IME window of the current thread */
        UserRefObjectCo(pwndNode, &Ref);
        co_IntSendMessage(*phwnd, WM_IME_SYSTEM, IMS_UPDATEIMEUI, 0);
        UserDerefObjectCo(pwndNode);
    }
 
    IntFreeHwndList(pWL);
}
 
/* x and y are always screen relative */
BOOLEAN FASTCALL
co_WinPosSetWindowPos(
   PWND Window,
   HWND WndInsertAfter,
   INT x,
   INT y,
   INT cx,
   INT cy,
   UINT flags
   )
{
   WINDOWPOS WinPos;
   RECTL NewWindowRect;
   RECTL NewClientRect;
   RECTL valid_rects[2];
   PREGION VisBefore = NULL;
   PREGION VisBeforeJustClient = NULL;
   PREGION VisAfter = NULL;
   PREGION CopyRgn = NULL;
   ULONG WvrFlags = 0;
   RECTL OldWindowRect, OldClientRect;
   int RgnType;
   HDC Dc;
   RECTL CopyRect;
   PWND Ancestor;
   BOOL bPointerInWindow, PosChanged = FALSE;
   PTHREADINFO pti = PsGetCurrentThreadWin32Thread();
 
   ASSERT_REFS_CO(Window);
 
   TRACE("pwnd %p, after %p, %d,%d (%dx%d), flags 0x%x\n",
         Window, WndInsertAfter, x, y, cx, cy, flags);
#if DBG
   dump_winpos_flags(flags);
#endif
 
   /* FIXME: Get current active window from active queue. Why? since r2915. */
 
   bPointerInWindow = IntPtInWindow(Window, gpsi->ptCursor.x, gpsi->ptCursor.y);
 
   WinPos.hwnd = UserHMGetHandle(Window);
   WinPos.hwndInsertAfter = WndInsertAfter;
   WinPos.x = x;
   WinPos.y = y;
   WinPos.cx = cx;
   WinPos.cy = cy;
   WinPos.flags = flags;
 
   if ( flags & SWP_ASYNCWINDOWPOS )
   {
      LRESULT lRes;
      PWINDOWPOS ppos = ExAllocatePoolWithTag(PagedPool, sizeof(WINDOWPOS), USERTAG_SWP);
      if ( ppos )
      {
         WinPos.flags &= ~SWP_ASYNCWINDOWPOS; // Clear flag.
         *ppos = WinPos;
         /* Yes it's a pointer inside Win32k! */
         lRes = co_IntSendMessageNoWait( WinPos.hwnd, WM_ASYNC_SETWINDOWPOS, 0, (LPARAM)ppos);
         /* We handle this the same way as Event Hooks and Hooks. */
         if ( !lRes )
         {
            ExFreePoolWithTag(ppos, USERTAG_SWP);
            return FALSE;
         }
         return TRUE;
      }
      return FALSE;
   }
 
   co_WinPosDoWinPosChanging(Window, &WinPos, &NewWindowRect, &NewClientRect);
 
   /* Does the window still exist? */
   if (!IntIsWindow(WinPos.hwnd))
   {
      TRACE("WinPosSetWindowPos: Invalid handle 0x%p!\n",WinPos.hwnd);
      EngSetLastError(ERROR_INVALID_WINDOW_HANDLE);
      return FALSE;
   }
 
   /* Fix up the flags. */
   if (!WinPosFixupFlags(&WinPos, Window))
   {
      // See Note.
      return TRUE;
   }
 
   Ancestor = UserGetAncestor(Window, GA_PARENT);
   if ( (WinPos.flags & (SWP_NOZORDER | SWP_HIDEWINDOW | SWP_SHOWWINDOW)) != SWP_NOZORDER &&
         Ancestor && UserHMGetHandle(Ancestor) == IntGetDesktopWindow() )
   {
      WinPos.hwndInsertAfter = WinPosDoOwnedPopups(Window, WinPos.hwndInsertAfter);
   }
 
   if (!(WinPos.flags & SWP_NOREDRAW))
   {
      /* Compute the visible region before the window position is changed */
      if (!(WinPos.flags & SWP_SHOWWINDOW) &&
           (WinPos.flags & (SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
                             SWP_HIDEWINDOW | SWP_FRAMECHANGED)) !=
            (SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER))
      {
         VisBefore = VIS_ComputeVisibleRegion(Window, FALSE, FALSE,
                                              (Window->style & WS_CLIPSIBLINGS) ? TRUE : FALSE);
 
         if ( VisBefore != NULL &&
              REGION_Complexity(VisBefore) == NULLREGION )
         {
            REGION_Delete(VisBefore);
            VisBefore = NULL;
         }
         else if(VisBefore)
         {
            REGION_bOffsetRgn(VisBefore, -Window->rcWindow.left, -Window->rcWindow.top);
         }
 
         /* Calculate the non client area for resizes, as this is used in the copy region */
         if ((WinPos.flags & (SWP_NOSIZE | SWP_FRAMECHANGED)) != SWP_NOSIZE)
         {
             VisBeforeJustClient = VIS_ComputeVisibleRegion(Window, TRUE, FALSE,
                 (Window->style & WS_CLIPSIBLINGS) ? TRUE : FALSE);
 
             if ( VisBeforeJustClient != NULL &&
                 REGION_Complexity(VisBeforeJustClient) == NULLREGION )
             {
                 REGION_Delete(VisBeforeJustClient);
                 VisBeforeJustClient = NULL;
             }
             else if(VisBeforeJustClient)
             {
                 REGION_bOffsetRgn(VisBeforeJustClient, -Window->rcWindow.left, -Window->rcWindow.top);
             }
         }
      }
   }
 
   if (Window->hrgnNewFrame)
   {
       SelectWindowRgn( Window, Window->hrgnNewFrame ); // Should be PSMWP->acvr->hrgnClip
       Window->hrgnNewFrame = NULL;
   }
 
   WvrFlags = co_WinPosDoNCCALCSize(Window, &WinPos, &NewWindowRect, &NewClientRect, valid_rects);
 
//   ERR("co_WinPosDoNCCALCSize returned 0x%x\n valid dest: %d %d %d %d\n valid src : %d %d %d %d\n", WvrFlags,
//      valid_rects[0].left,valid_rects[0].top,valid_rects[0].right,valid_rects[0].bottom,
//      valid_rects[1].left,valid_rects[1].top,valid_rects[1].right,valid_rects[1].bottom);
 
   /* Validate link windows. (also take into account shell window in hwndShellWindow) */
   if (!(WinPos.flags & SWP_NOZORDER) && WinPos.hwnd != UserGetShellWindow())
   {
      IntLinkHwnd(Window, WinPos.hwndInsertAfter);
   }
 
   OldWindowRect = Window->rcWindow;
   OldClientRect = Window->rcClient;
 
   if (NewClientRect.left != OldClientRect.left ||
       NewClientRect.top  != OldClientRect.top)
   {
      // Move child window if their parent is moved. Keep Child window relative to Parent...
      WinPosInternalMoveWindow(Window,
                               NewClientRect.left - OldClientRect.left,
                               NewClientRect.top - OldClientRect.top);
      PosChanged = TRUE;
   }
 
   Window->rcWindow = NewWindowRect;
   Window->rcClient = NewClientRect;
 
   /* erase parent when hiding or resizing child */
   if (WinPos.flags & SWP_HIDEWINDOW)
   {
      /* Clear the update region */
      co_UserRedrawWindow( Window,
                           NULL,
                           0,
                           RDW_VALIDATE | RDW_NOFRAME | RDW_NOERASE | RDW_NOINTERNALPAINT | RDW_ALLCHILDREN);
 
      if (UserIsDesktopWindow(Window->spwndParent))
         co_IntShellHookNotify(HSHELL_WINDOWDESTROYED, (WPARAM)UserHMGetHandle(Window), 0);
 
      Window->style &= ~WS_VISIBLE; //IntSetStyle( Window, 0, WS_VISIBLE );
      Window->head.pti->cVisWindows--;
      IntNotifyWinEvent(EVENT_OBJECT_HIDE, Window, OBJID_WINDOW, CHILDID_SELF, WEF_SETBYWNDPTI);
   }
   else if (WinPos.flags & SWP_SHOWWINDOW)
   {
      if (Window->style & WS_CHILD)
      {
         if ((Window->style & WS_POPUP) && (Window->ExStyle & WS_EX_APPWINDOW))
         {
            co_IntShellHookNotify(HSHELL_WINDOWCREATED, (WPARAM)UserHMGetHandle(Window), 0);
            if (!(WinPos.flags & SWP_NOACTIVATE))
               UpdateShellHook(Window);
         }
      }
      else if ((Window->ExStyle & WS_EX_APPWINDOW) ||
          (!(Window->ExStyle & WS_EX_TOOLWINDOW) && !Window->spwndOwner &&
           (!Window->spwndParent || UserIsDesktopWindow(Window->spwndParent))))
      {
         if (!UserIsDesktopWindow(Window))
         {
            co_IntShellHookNotify(HSHELL_WINDOWCREATED, (WPARAM)UserHMGetHandle(Window), 0);
            if (!(WinPos.flags & SWP_NOACTIVATE))
               UpdateShellHook(Window);
         }
      }
 
      Window->style |= WS_VISIBLE; //IntSetStyle( Window, WS_VISIBLE, 0 );
      Window->head.pti->cVisWindows++;
      IntNotifyWinEvent(EVENT_OBJECT_SHOW, Window, OBJID_WINDOW, CHILDID_SELF, WEF_SETBYWNDPTI);
   }
   else
   {
      IntCheckFullscreen(Window);
   }
 
   if (Window->hrgnUpdate != NULL && Window->hrgnUpdate != HRGN_WINDOW)
   {
      NtGdiOffsetRgn(Window->hrgnUpdate,
                     NewWindowRect.left - OldWindowRect.left,
                     NewWindowRect.top - OldWindowRect.top);
   }
 
   DceResetActiveDCEs(Window); // For WS_VISIBLE changes.
 
   // Change or update, set send non-client paint flag.
   if ( Window->style & WS_VISIBLE &&
       (WinPos.flags & SWP_STATECHANGED || (!(Window->state2 & WNDS2_WIN31COMPAT) && WinPos.flags & SWP_NOREDRAW ) ) )
   {
      TRACE("Set WNDS_SENDNCPAINT %p\n",Window);
      Window->state |= WNDS_SENDNCPAINT;
   }
 
   if (!(WinPos.flags & SWP_NOREDRAW) && ((WinPos.flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOPOSCHANGE))
   {
      /* Determine the new visible region */
      VisAfter = VIS_ComputeVisibleRegion(Window, FALSE, FALSE,
                                          (Window->style & WS_CLIPSIBLINGS) ? TRUE : FALSE);
 
      if ( VisAfter != NULL &&
           REGION_Complexity(VisAfter) == NULLREGION )
      {
         REGION_Delete(VisAfter);
         VisAfter = NULL;
      }
      else if(VisAfter)
      {
          /* Clip existing update region to new window size */
          if (Window->hrgnUpdate != NULL)
          {
              PREGION RgnUpdate = REGION_LockRgn(Window->hrgnUpdate);
              if (RgnUpdate)
              {
                  RgnType = IntGdiCombineRgn(RgnUpdate, RgnUpdate, VisAfter, RGN_AND);
                  REGION_UnlockRgn(RgnUpdate);
              }
          }
          REGION_bOffsetRgn(VisAfter, -Window->rcWindow.left, -Window->rcWindow.top);
      }
 
      /*
       * Determine which pixels can be copied from the old window position
       * to the new. Those pixels must be visible in both the old and new
       * position. Also, check the class style to see if the windows of this
       * class need to be completely repainted on (horizontal/vertical) size
       * change.
       */
      if (VisBefore != NULL &&
          VisAfter != NULL &&
          !(WvrFlags & WVR_REDRAW) &&
          !(WinPos.flags & SWP_NOCOPYBITS) &&
          !(Window->ExStyle & WS_EX_TRANSPARENT))
      {
 
         /*
          * If this is (also) a window resize, the whole nonclient area
          * needs to be repainted. So we limit the copy to the client area,
          * 'cause there is no use in copying it (would possibly cause
          * "flashing" too). However, if the copy region is already empty,
          * we don't have to crop (can't take anything away from an empty
          * region...)
          */
 
         CopyRgn = IntSysCreateRectpRgn(0, 0, 0, 0);
         if ((WinPos.flags & SWP_NOSIZE) && (WinPos.flags & SWP_NOCLIENTSIZE))
            RgnType = IntGdiCombineRgn(CopyRgn, VisAfter, VisBefore, RGN_AND);
         else if (VisBeforeJustClient != NULL)
         {
            RgnType = IntGdiCombineRgn(CopyRgn, VisAfter, VisBeforeJustClient, RGN_AND);
         }
 
         /* Now use in copying bits which are in the update region. */
         if (Window->hrgnUpdate != NULL)
         {
            PREGION RgnUpdate = REGION_LockRgn(Window->hrgnUpdate);
            if (RgnUpdate)
            {
                REGION_bOffsetRgn(CopyRgn, NewWindowRect.left, NewWindowRect.top);
                IntGdiCombineRgn(CopyRgn, CopyRgn, RgnUpdate, RGN_DIFF);
                REGION_bOffsetRgn(CopyRgn, -NewWindowRect.left, -NewWindowRect.top);
                REGION_UnlockRgn(RgnUpdate);
            }
         }
 
         /*
          * Now, get the bounding box of the copy region. If it's empty
          * there's nothing to copy. Also, it's no use copying bits onto
          * themselves.
          */
         if (REGION_GetRgnBox(CopyRgn, &CopyRect) == NULLREGION)
         {
            /* Nothing to copy, clean up */
            REGION_Delete(CopyRgn);
            CopyRgn = NULL;
         }
         else if ( OldWindowRect.left != NewWindowRect.left ||
                   OldWindowRect.top != NewWindowRect.top ||
                  (WinPos.flags & SWP_FRAMECHANGED) )
         {
             HRGN DcRgn = NtGdiCreateRectRgn(0, 0, 0, 0);
             PREGION DcRgnObj = REGION_LockRgn(DcRgn);
 
          /*
           * Small trick here: there is no function to bitblt a region. So
           * we set the region as the clipping region, take the bounding box
           * of the region and bitblt that. Since nothing outside the clipping
           * region is copied, this has the effect of bitblt'ing the region.
           *
           * Since NtUserGetDCEx takes ownership of the clip region, we need
           * to create a copy of CopyRgn and pass that. We need CopyRgn later
           */
            IntGdiCombineRgn(DcRgnObj, CopyRgn, NULL, RGN_COPY);
            REGION_bOffsetRgn(DcRgnObj, NewWindowRect.left, NewWindowRect.top);
            REGION_UnlockRgn(DcRgnObj);
            Dc = UserGetDCEx( Window,
                              DcRgn,
                              DCX_WINDOW|DCX_CACHE|DCX_INTERSECTRGN|DCX_CLIPSIBLINGS|DCX_KEEPCLIPRGN); // DCX_WINDOW will set first, go read WinDC.c.
            NtGdiBitBlt( Dc,
                         CopyRect.left, CopyRect.top,
                         CopyRect.right - CopyRect.left,
                         CopyRect.bottom - CopyRect.top,
                         Dc,
                         CopyRect.left + (OldWindowRect.left - NewWindowRect.left),
                         CopyRect.top + (OldWindowRect.top - NewWindowRect.top),
                         SRCCOPY,
                         0,
                         0);
 
            UserReleaseDC(Window, Dc, FALSE);
            IntValidateParent(Window, CopyRgn);
            GreDeleteObject(DcRgn);
         }
      }
      else
      {
         CopyRgn = NULL;
      }
 
      /* We need to redraw what wasn't visible before or force a redraw */
      if (VisAfter != NULL)
      {
         PREGION DirtyRgn = IntSysCreateRectpRgn(0, 0, 0, 0);
         if (DirtyRgn)
         {
             if (CopyRgn != NULL)
             {
                RgnType = IntGdiCombineRgn(DirtyRgn, VisAfter, CopyRgn, RGN_DIFF);
             }
             else
             {
                RgnType = IntGdiCombineRgn(DirtyRgn, VisAfter, 0, RGN_COPY);
             }
 
             if (RgnType != ERROR && RgnType != NULLREGION) // Regions moved.
             {
            /* old code
                NtGdiOffsetRgn(DirtyRgn, Window->rcWindow.left, Window->rcWindow.top);
                IntInvalidateWindows( Window,
                                      DirtyRgn,
                   RDW_ERASE | RDW_FRAME | RDW_INVALIDATE | RDW_ALLCHILDREN);
             }
             GreDeleteObject(DirtyRgn);
             */
 
                PWND Parent = Window->spwndParent;
 
                REGION_bOffsetRgn( DirtyRgn, Window->rcWindow.left, Window->rcWindow.top);
 
                if ( (Window->style & WS_CHILD) && (Parent) && !(Parent->style & WS_CLIPCHILDREN))
                {
                   IntInvalidateWindows( Parent, DirtyRgn, RDW_ERASE | RDW_INVALIDATE);
                   co_IntPaintWindows(Parent, RDW_NOCHILDREN, FALSE);
                }
                IntInvalidateWindows(Window, DirtyRgn, RDW_ERASE | RDW_FRAME | RDW_INVALIDATE | RDW_ALLCHILDREN);
             }
             else if (RgnType != ERROR && RgnType == NULLREGION) // Must be the same. See CORE-7166 & CORE-15934, NC HACK fix.
             {
                if ( !PosChanged &&
                     !(WinPos.flags & SWP_DEFERERASE) &&
                      (WinPos.flags & SWP_FRAMECHANGED) )
                {
                    PWND pwnd = Window;
                    PWND Parent = Window->spwndParent;
 
                    if ( pwnd->style & WS_CHILD ) // Fix ProgMan menu bar drawing.
                    {
                        TRACE("SWP_FRAMECHANGED win child %p Parent %p\n",pwnd,Parent);
                        pwnd = Parent ? Parent : pwnd;
                    }
 
                    if ( !(pwnd->style & WS_CHILD) )
                    {
                        /*
                         * Check if we have these specific windows style bits set/reset.
                         * FIXME: There may be other combinations of styles that need this handling as well.
                         * This fixes the ReactOS Calculator buttons disappearing in CORE-16827.
                         */
                        if ((Window->style & WS_CLIPSIBLINGS) && !(Window->style & (WS_POPUP | WS_CLIPCHILDREN | WS_SIZEBOX)))
                        {
                            IntSendNCPaint(pwnd, HRGN_WINDOW); // Paint the whole frame.
                        }
                        else  // Use region handling
                        {
                            HRGN DcRgn = NtGdiCreateRectRgn(0, 0, 0, 0);
                            PREGION DcRgnObj = REGION_LockRgn(DcRgn);
                            TRACE("SWP_FRAMECHANGED win %p hRgn %p\n",pwnd, DcRgn);
                            IntGdiCombineRgn(DcRgnObj, VisBefore, NULL, RGN_COPY);
                            REGION_UnlockRgn(DcRgnObj);
                            ForceNCPaintErase(pwnd, DcRgn, DcRgnObj);
                            GreDeleteObject(DcRgn);
                        }
                    }
                }
             }
             REGION_Delete(DirtyRgn);
         }
      }
 
      /* Expose what was covered before but not covered anymore */
      if (VisBefore != NULL)
      {
         PREGION ExposedRgn = IntSysCreateRectpRgn(0, 0, 0, 0);
         if (ExposedRgn)
         {
             RgnType = IntGdiCombineRgn(ExposedRgn, VisBefore, NULL, RGN_COPY);
             REGION_bOffsetRgn(ExposedRgn,
                               OldWindowRect.left - NewWindowRect.left,
                               OldWindowRect.top  - NewWindowRect.top);
 
             if (VisAfter != NULL)
                RgnType = IntGdiCombineRgn(ExposedRgn, ExposedRgn, VisAfter, RGN_DIFF);
 
             if (RgnType != ERROR && RgnType != NULLREGION)
             {
                co_VIS_WindowLayoutChanged(Window, ExposedRgn);
             }
             REGION_Delete(ExposedRgn);
         }
      }
   }
 
   if (!(WinPos.flags & (SWP_NOACTIVATE|SWP_HIDEWINDOW)))
   {
      if ((Window->style & (WS_CHILD | WS_POPUP)) == WS_CHILD)
      {
         co_IntSendMessageNoWait(WinPos.hwnd, WM_CHILDACTIVATE, 0, 0);
      }
      else
      {
         //ERR("SetWindowPos Set FG Window!\n");
         if ( pti->MessageQueue->spwndActive != Window ||
              pti->MessageQueue != gpqForeground )
         {
            //ERR("WPSWP : set active window\n");
            if (!(Window->state & WNDS_BEINGACTIVATED)) // Inside SAW?
            {
               co_IntSetForegroundWindow(Window); // Fixes SW_HIDE issues. Wine win test_SetActiveWindow & test_SetForegroundWindow.
            }
         }
      }
   }
 
   if ( !PosChanged &&
         (WinPos.flags & SWP_FRAMECHANGED) &&
        !(WinPos.flags & SWP_DEFERERASE) &&    // Prevent sending WM_SYNCPAINT message. 
         VisAfter )
   {
       PWND Parent = Window->spwndParent;
       if ( !(Window->style & WS_CHILD) && (Parent) && (Parent->style & WS_CLIPCHILDREN))
       {
           TRACE("SWP_FRAMECHANGED Parent %p WS_CLIPCHILDREN %p\n",Parent,Window);
           UserSyncAndPaintWindows(Parent, RDW_CLIPCHILDREN); // NC should redraw here, see NC HACK fix.
       }
   }
 
   // Fix wine msg test_SetFocus, prevents sending WM_WINDOWPOSCHANGED.
   if ( VisBefore == NULL &&
        VisBeforeJustClient == NULL &&
       !(Window->ExStyle & WS_EX_TOPMOST) &&
        (WinPos.flags & SWP_AGG_STATUSFLAGS) == (SWP_AGG_NOPOSCHANGE & ~SWP_NOZORDER))
   {
      TRACE("No drawing, set no Z order and no redraw!\n");
      WinPos.flags |= SWP_NOZORDER|SWP_NOREDRAW;
   }
 
   if (VisBefore != NULL)
   {
      REGION_Delete(VisBefore);
      VisBefore = NULL;
   }
   if (VisBeforeJustClient != NULL)
   {
      REGION_Delete(VisBeforeJustClient);
      VisBeforeJustClient = NULL;
   }
   if (VisAfter != NULL)
   {
      REGION_Delete(VisAfter);
      VisAfter = NULL;
   }
   if (CopyRgn != NULL)
   {
      REGION_Delete(CopyRgn);
      CopyRgn = NULL;
   }
 
   if(!(flags & SWP_DEFERERASE))
   {
       /* erase parent when hiding or resizing child */
       if ((flags & SWP_HIDEWINDOW) ||
         (!(flags & SWP_SHOWWINDOW) &&
          (WinPos.flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOGEOMETRYCHANGE))
       {
           PWND Parent = Window->spwndParent;
           if (!Parent || UserIsDesktopWindow(Parent)) Parent = Window;
           UserSyncAndPaintWindows( Parent, RDW_ERASENOW);
       }
 
       /* Give newly shown windows a chance to redraw */
       if(((WinPos.flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOPOSCHANGE)
                && !(flags & SWP_AGG_NOCLIENTCHANGE) && (flags & SWP_SHOWWINDOW))
       {
           UserSyncAndPaintWindows( Window, RDW_ERASENOW);
       }
   }
 
   /* And last, send the WM_WINDOWPOSCHANGED message */
 
   TRACE("\tstatus hwnd %p flags = %04x\n", Window ? UserHMGetHandle(Window) : NULL, WinPos.flags & SWP_AGG_STATUSFLAGS);
 
   if (((WinPos.flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOPOSCHANGE)
            && !((flags & SWP_AGG_NOCLIENTCHANGE) && (flags & SWP_SHOWWINDOW)))
   {
      /* WM_WINDOWPOSCHANGED is sent even if SWP_NOSENDCHANGING is set
         and always contains final window position.
       */
      WinPos.x = NewWindowRect.left;
      WinPos.y = NewWindowRect.top;
      WinPos.cx = NewWindowRect.right - NewWindowRect.left;
      WinPos.cy = NewWindowRect.bottom - NewWindowRect.top;
      TRACE("WM_WINDOWPOSCHANGED hwnd %p Flags %04x\n",WinPos.hwnd,WinPos.flags);
      co_IntSendMessageNoWait(WinPos.hwnd, WM_WINDOWPOSCHANGED, 0, (LPARAM) &WinPos);
   }
 
   if ( WinPos.flags & SWP_FRAMECHANGED  || WinPos.flags & SWP_STATECHANGED ||
      !(WinPos.flags & SWP_NOCLIENTSIZE) || !(WinPos.flags & SWP_NOCLIENTMOVE) )
   {
      PWND pWnd = ValidateHwndNoErr(WinPos.hwnd);
      if (pWnd)
         IntNotifyWinEvent(EVENT_OBJECT_LOCATIONCHANGE, pWnd, OBJID_WINDOW, CHILDID_SELF, WEF_SETBYWNDPTI);
   }
 
   /* Send WM_IME_SYSTEM:IMS_UPDATEIMEUI to the IME windows if necessary */
   if ((WinPos.flags & (SWP_NOMOVE | SWP_NOSIZE)) != (SWP_NOMOVE | SWP_NOSIZE))
   {
      if (IS_IMM_MODE())
          IntImeWindowPosChanged();
   }
 
   if(bPointerInWindow != IntPtInWindow(Window, gpsi->ptCursor.x, gpsi->ptCursor.y))
   {
      /* Generate mouse move message */
      MSG msg;
      msg.message = WM_MOUSEMOVE;
      msg.wParam = UserGetMouseButtonsState();
      msg.lParam = MAKELPARAM(gpsi->ptCursor.x, gpsi->ptCursor.y);
      msg.pt = gpsi->ptCursor;
      co_MsqInsertMouseMessage(&msg, 0, 0, TRUE);
   }
 
   return TRUE;
}
 
LRESULT FASTCALL
co_WinPosGetNonClientSize(PWND Window, RECT* WindowRect, RECT* ClientRect)
{
   LRESULT Result;
 
   ASSERT_REFS_CO(Window);
 
   *ClientRect = *WindowRect;
   Result = co_IntSendMessageNoWait(UserHMGetHandle(Window), WM_NCCALCSIZE, FALSE, (LPARAM)ClientRect);
 
   FixClientRect(ClientRect, WindowRect);
 
   return Result;
}
 
void FASTCALL
co_WinPosSendSizeMove(PWND Wnd)
{
    RECTL Rect;
    LPARAM lParam;
    WPARAM wParam = SIZE_RESTORED;
 
    IntGetClientRect(Wnd, &Rect);
    lParam = MAKELONG(Rect.right-Rect.left, Rect.bottom-Rect.top);
 
    Wnd->state &= ~WNDS_SENDSIZEMOVEMSGS;
 
    if (Wnd->style & WS_MAXIMIZE)
    {
        wParam = SIZE_MAXIMIZED;
    }
    else if (Wnd->style & WS_MINIMIZE)
    {
        wParam = SIZE_MINIMIZED;
        lParam = 0;
    }
 
    co_IntSendMessageNoWait(UserHMGetHandle(Wnd), WM_SIZE, wParam, lParam);
 
    if (UserIsDesktopWindow(Wnd->spwndParent))
       lParam = MAKELONG(Wnd->rcClient.left, Wnd->rcClient.top);
    else
       lParam = MAKELONG(Wnd->rcClient.left-Wnd->spwndParent->rcClient.left, Wnd->rcClient.top-Wnd->spwndParent->rcClient.top);
 
    co_IntSendMessageNoWait(UserHMGetHandle(Wnd), WM_MOVE, 0, lParam);
 
    IntEngWindowChanged(Wnd, WOC_RGN_CLIENT);
}
 
UINT FASTCALL
co_WinPosMinMaximize(PWND Wnd, UINT ShowFlag, RECT* NewPos)
{
   POINT Size;
   WINDOWPLACEMENT wpl;
   LONG old_style;
   UINT SwpFlags = 0;
 
   ASSERT_REFS_CO(Wnd);
 
   wpl.length = sizeof(wpl);
   IntGetWindowPlacement( Wnd, &wpl );
 
   if (co_HOOK_CallHooks(WH_CBT, HCBT_MINMAX, (WPARAM)UserHMGetHandle(Wnd), ShowFlag))
   {
      ERR("WinPosMinMaximize WH_CBT Call Hook return!\n");
      return SWP_NOSIZE | SWP_NOMOVE;
   }
      if (Wnd->style & WS_MINIMIZE)
      {
         switch (ShowFlag)
         {
         case SW_MINIMIZE:
         case SW_SHOWMINNOACTIVE:
         case SW_SHOWMINIMIZED:
         case SW_FORCEMINIMIZE:
             return SWP_NOSIZE | SWP_NOMOVE;
         }
         if (!co_IntSendMessageNoWait(UserHMGetHandle(Wnd), WM_QUERYOPEN, 0, 0))
         {
            return(SWP_NOSIZE | SWP_NOMOVE);
         }
         SwpFlags |= SWP_NOCOPYBITS;
      }
      switch (ShowFlag)
      {
         case SW_MINIMIZE:
         case SW_SHOWMINNOACTIVE:
         case SW_SHOWMINIMIZED:
         case SW_FORCEMINIMIZE:
            {
               //ERR("MinMaximize Minimize\n");
               if (Wnd->style & WS_MAXIMIZE)
               {
                  Wnd->InternalPos.flags |= WPF_RESTORETOMAXIMIZED;
               }
               else
               {
                  Wnd->InternalPos.flags &= ~WPF_RESTORETOMAXIMIZED;
               }
 
               old_style = IntSetStyle( Wnd, WS_MINIMIZE, WS_MAXIMIZE );
 
               co_UserRedrawWindow(Wnd, NULL, 0, RDW_VALIDATE | RDW_NOERASE | RDW_NOINTERNALPAINT);
 
               if (!(Wnd->InternalPos.flags & WPF_SETMINPOSITION))
                  Wnd->InternalPos.flags &= ~WPF_MININIT;
 
               WinPosFindIconPos(Wnd, &wpl.ptMinPosition);
 
               if (!(old_style & WS_MINIMIZE))
               {
                  SwpFlags |= SWP_STATECHANGED;
                  IntShowOwnedPopups(Wnd, FALSE);
               }
 
               RECTL_vSetRect(NewPos, wpl.ptMinPosition.x, wpl.ptMinPosition.y,
                             wpl.ptMinPosition.x + UserGetSystemMetrics(SM_CXMINIMIZED),
                             wpl.ptMinPosition.y + UserGetSystemMetrics(SM_CYMINIMIZED));
               SwpFlags |= SWP_NOCOPYBITS;
               break;
            }
 
         case SW_MAXIMIZE:
            {
               //ERR("MinMaximize Maximize\n");
               IntSetSnapEdge(Wnd, HTNOWHERE); /* Mark as not snapped (for Win+Left,Up,Down) */
               if ((Wnd->style & WS_MAXIMIZE) && (Wnd->style & WS_VISIBLE))
               {
                  SwpFlags = SWP_NOSIZE | SWP_NOMOVE;
                  break;
               }
               co_WinPosGetMinMaxInfo(Wnd, &Size, &wpl.ptMaxPosition, NULL, NULL);
 
               /*ERR("Maximize: %d,%d %dx%d\n",
                      wpl.ptMaxPosition.x, wpl.ptMaxPosition.y, Size.x, Size.y);
                */
               old_style = IntSetStyle( Wnd, WS_MAXIMIZE, WS_MINIMIZE );
               /*if (old_style & WS_MINIMIZE)
               {
                  IntShowOwnedPopups(Wnd, TRUE);
               }*/
 
               if (!(old_style & WS_MAXIMIZE)) SwpFlags |= SWP_STATECHANGED;
               RECTL_vSetRect(NewPos, wpl.ptMaxPosition.x, wpl.ptMaxPosition.y,
                              //wpl.ptMaxPosition.x + Size.x, wpl.ptMaxPosition.y + Size.y);
                              Size.x, Size.y);
               break;
            }
 
         case SW_SHOWNOACTIVATE:
            Wnd->InternalPos.flags &= ~WPF_RESTORETOMAXIMIZED;
            /* fall through */
         case SW_SHOWNORMAL:
         case SW_RESTORE:
         case SW_SHOWDEFAULT: /* FIXME: should have its own handler */
            {
               //ERR("MinMaximize Restore\n");
               old_style = IntSetStyle( Wnd, 0, WS_MINIMIZE | WS_MAXIMIZE );
               if (old_style & WS_MINIMIZE)
               {
                  IntShowOwnedPopups(Wnd, TRUE);
 
                  if (Wnd->InternalPos.flags & WPF_RESTORETOMAXIMIZED)
                  {
                     co_WinPosGetMinMaxInfo(Wnd, &Size, &wpl.ptMaxPosition, NULL, NULL);
                     IntSetStyle( Wnd, WS_MAXIMIZE, 0 );
                     SwpFlags |= SWP_STATECHANGED;
                     RECTL_vSetRect(NewPos, wpl.ptMaxPosition.x, wpl.ptMaxPosition.y,
                                    wpl.ptMaxPosition.x + Size.x, wpl.ptMaxPosition.y + Size.y);
                     break;
                  }
                  else
                  {
                     *NewPos = wpl.rcNormalPosition;
                     if (ShowFlag != SW_SHOWNORMAL && ShowFlag != SW_SHOWDEFAULT)
                     {
                        UINT edge = IntGetWindowSnapEdge(Wnd);
                        if (edge)
                           co_IntCalculateSnapPosition(Wnd, edge, NewPos);
                     }
                     NewPos->right -= NewPos->left;
                     NewPos->bottom -= NewPos->top;
                     break;
                  }
               }
               else
               {
                  if (!(old_style & WS_MAXIMIZE))
                  {
                     break;
                  }
                  SwpFlags |= SWP_STATECHANGED;
                  Wnd->InternalPos.flags &= ~WPF_RESTORETOMAXIMIZED;
                  *NewPos = wpl.rcNormalPosition;
                  NewPos->right -= NewPos->left;
                  NewPos->bottom -= NewPos->top;
                  break;
               }
            }
      }
   return SwpFlags;
}
 
/*
   ShowWindow does not set SWP_FRAMECHANGED!!! Fix wine msg test_SetParent:WmSetParentSeq_2:23 wParam bits!
   Win: xxxShowWindow
 */
BOOLEAN FASTCALL
co_WinPosShowWindow(PWND Wnd, INT Cmd)
{
   BOOLEAN WasVisible;
   UINT Swp = 0, EventMsg = 0;
   RECTL NewPos = {0, 0, 0, 0};
   BOOLEAN ShowFlag;
   LONG style;
   PWND Parent;
   PTHREADINFO pti;
   //HRGN VisibleRgn;
   BOOL ShowOwned = FALSE;
   BOOL FirstTime = FALSE;
   ASSERT_REFS_CO(Wnd);
   //KeRosDumpStackFrames(NULL, 20);
   pti = PsGetCurrentThreadWin32Thread();
   WasVisible = (Wnd->style & WS_VISIBLE) != 0;
   style = Wnd->style;
 
   TRACE("co_WinPosShowWindow START hwnd %p Cmd %d usicmd %u\n",
         UserHMGetHandle(Wnd), Cmd, pti->ppi->usi.wShowWindow);
 
   if ( pti->ppi->usi.dwFlags & STARTF_USESHOWWINDOW )
   {
      if ((Wnd->style & (WS_POPUP|WS_CHILD)) != WS_CHILD)
      {
         if ((Wnd->style & WS_CAPTION) == WS_CAPTION)
         {
            if (Wnd->spwndOwner == NULL)
            {
               if ( Cmd == SW_SHOWNORMAL || Cmd == SW_SHOW)
               {
                    Cmd = SW_SHOWDEFAULT;
               }
               FirstTime = TRUE;
               TRACE("co_WPSW FT 1\n");
            }
         }
      }
   }
 
   if ( Cmd == SW_SHOWDEFAULT )
   {
      if ( pti->ppi->usi.dwFlags & STARTF_USESHOWWINDOW )
      {
         Cmd = pti->ppi->usi.wShowWindow;
         FirstTime = TRUE;
         TRACE("co_WPSW FT 2\n");
      }
   }
 
   if (FirstTime)
   {
      pti->ppi->usi.dwFlags &= ~(STARTF_USEPOSITION|STARTF_USESIZE|STARTF_USESHOWWINDOW);
   }
 
   switch (Cmd)
   {
      case SW_HIDE:
         {
            if (!WasVisible)
            {
               //ERR("co_WinPosShowWindow Exit Bad\n");
               return FALSE;
            }
            Swp |= SWP_HIDEWINDOW | SWP_NOSIZE | SWP_NOMOVE;
            if (Wnd != pti->MessageQueue->spwndActive)
               Swp |= SWP_NOACTIVATE | SWP_NOZORDER;
            break;
         }
 
      case SW_FORCEMINIMIZE: /* FIXME: Does not work if thread is hung. */
      case SW_SHOWMINNOACTIVE:
         Swp |= SWP_NOACTIVATE | SWP_NOZORDER;
         /* Fall through. */
      case SW_SHOWMINIMIZED:
      case SW_MINIMIZE: /* CORE-15669: SW_MINIMIZE also shows */
         Swp |= SWP_SHOWWINDOW;
         {
            Swp |= SWP_NOACTIVATE;
            if (!(style & WS_MINIMIZE))
            {
               IntShowOwnedPopups(Wnd, FALSE );
               // Fix wine Win test_SetFocus todo #1 & #2,
               if (Cmd == SW_SHOWMINIMIZED)
               {
                  //ERR("co_WinPosShowWindow Set focus 1\n");
                  if ((style & (WS_CHILD | WS_POPUP)) == WS_CHILD)
                     co_UserSetFocus(Wnd->spwndParent);
                  else
                     co_UserSetFocus(0);
               }
 
               Swp |= co_WinPosMinMaximize(Wnd, Cmd, &NewPos);
 
               EventMsg = EVENT_SYSTEM_MINIMIZESTART;
            }
            else
            {
               if (WasVisible)
               {
                  //ERR("co_WinPosShowWindow Exit Good\n");
                  return TRUE;
               }
               Swp |= SWP_NOSIZE | SWP_NOMOVE;
            }
            break;
         }
 
      case SW_SHOWMAXIMIZED:
         {
            Swp |= SWP_SHOWWINDOW;
            if (!(style & WS_MAXIMIZE))
            {
               ShowOwned = TRUE;
 
               Swp |= co_WinPosMinMaximize(Wnd, SW_MAXIMIZE, &NewPos);
 
               EventMsg = EVENT_SYSTEM_MINIMIZEEND;
            }
            else
            {
               if (WasVisible)
               {
                  //ERR("co_WinPosShowWindow Exit Good 1\n");
                  return TRUE;
               }
               Swp |= SWP_NOSIZE | SWP_NOMOVE;
            }
            break;
         }
 
      case SW_SHOWNA:
         Swp |= SWP_NOACTIVATE | SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE;
         if (style & WS_CHILD && !(Wnd->ExStyle & WS_EX_MDICHILD)) Swp |= SWP_NOZORDER;
         break;
      case SW_SHOW:
         if (WasVisible) return(TRUE); // Nothing to do!
         Swp |= SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE;
         /* Don't activate the topmost window. */
         if (style & WS_CHILD && !(Wnd->ExStyle & WS_EX_MDICHILD)) Swp |= SWP_NOACTIVATE | SWP_NOZORDER;
         break;
 
      case SW_SHOWNOACTIVATE:
         Swp |= SWP_NOACTIVATE | SWP_NOZORDER;
         /* Fall through. */
      case SW_SHOWNORMAL:
      case SW_SHOWDEFAULT:
      case SW_RESTORE:
         if (!WasVisible) Swp |= SWP_SHOWWINDOW;
         if (style & (WS_MINIMIZE | WS_MAXIMIZE))
         {
            Swp |= co_WinPosMinMaximize(Wnd, Cmd, &NewPos);
            if (style & WS_MINIMIZE) EventMsg = EVENT_SYSTEM_MINIMIZEEND;
         }
         else
         {
            if (WasVisible)
            {
               //ERR("co_WinPosShowWindow Exit Good 3\n");
               return TRUE;
            }
            Swp |= SWP_NOSIZE | SWP_NOMOVE;
         }
         if ( style & WS_CHILD &&
             !(Wnd->ExStyle & WS_EX_MDICHILD) &&
             !(Swp & SWP_STATECHANGED))
            Swp |= SWP_NOACTIVATE | SWP_NOZORDER;
         break;
 
      default:
         //ERR("co_WinPosShowWindow Exit Good 4\n");
         return FALSE;
   }
 
   ShowFlag = (Cmd != SW_HIDE);
 
   if ((ShowFlag != WasVisible || Cmd == SW_SHOWNA) && Cmd != SW_SHOWMAXIMIZED && !(Swp & SWP_STATECHANGED))
   {
      co_IntSendMessageNoWait(UserHMGetHandle(Wnd), WM_SHOWWINDOW, ShowFlag, 0);
#if 0 // Fix wine msg test_SetParent:WmSetParentSeq_1:2
      if (!(Wnd->state2 & WNDS2_WIN31COMPAT)) // <------------- XP sets this bit!
         co_IntSendMessageNoWait(UserHMGetHandle(Wnd), WM_SETVISIBLE, ShowFlag, 0);
#endif
      if (!VerifyWnd(Wnd)) return WasVisible;
   }
 
   /* We can't activate a child window */
   if ((Wnd->style & WS_CHILD) &&
       !(Wnd->ExStyle & WS_EX_MDICHILD) &&
       Cmd != SW_SHOWNA)
   {
      //ERR("SWP Child No active and ZOrder\n");
      Swp |= SWP_NOACTIVATE | SWP_NOZORDER;
   }
 
#if 0 // Explorer issues with common controls? Someone does not know how CS_SAVEBITS works.
      // Breaks startup and shutdown active window...
   if ((Wnd->style & (WS_POPUP|WS_CHILD)) != WS_CHILD &&
        Wnd->pcls->style & CS_SAVEBITS &&
        ((Cmd == SW_SHOW) || (Cmd == SW_NORMAL)))
   {
      ERR("WinPosShowWindow Set active\n");
      //UserSetActiveWindow(Wnd);
      co_IntSetForegroundWindow(Wnd); // HACK
      Swp |= SWP_NOACTIVATE | SWP_NOZORDER;
   }
#endif
 
   if (IsChildVisible(Wnd) || Swp & SWP_STATECHANGED)
   {
       TRACE("Child is Vis %s or State changed %s. ShowFlag %s Swp %04x\n",
             (IsChildVisible(Wnd) ? "TRUE" : "FALSE"), (Swp & SWP_STATECHANGED ? "TRUE" : "FALSE"),
             (ShowFlag ? "TRUE" : "FALSE"),LOWORD(Swp));
   co_WinPosSetWindowPos( Wnd,
                          0 != (Wnd->ExStyle & WS_EX_TOPMOST) ? HWND_TOPMOST : HWND_TOP,
                          NewPos.left,
                          NewPos.top,
                          NewPos.right, // NewPos.right - NewPos.left, when minimized and restore, the window becomes smaller.
                          NewPos.bottom,// NewPos.bottom - NewPos.top,
                          LOWORD(Swp));
   }
   else
   {
      TRACE("Parent Vis?\n");
      /* if parent is not visible simply toggle WS_VISIBLE and return */
      if (ShowFlag) IntSetStyle( Wnd, WS_VISIBLE, 0 );
      else IntSetStyle( Wnd, 0, WS_VISIBLE );
   }
 
   if ( EventMsg ) IntNotifyWinEvent(EventMsg, Wnd, OBJID_WINDOW, CHILDID_SELF, WEF_SETBYWNDPTI);
 
   if ( ShowOwned ) IntShowOwnedPopups(Wnd, TRUE );
 
   if ((Cmd == SW_HIDE) || (Cmd == SW_MINIMIZE))
   {
      if ( Wnd == pti->MessageQueue->spwndActive && pti->MessageQueue == IntGetFocusMessageQueue()  )
      {
          if (UserIsDesktopWindow(Wnd->spwndParent))
          {
              if (!ActivateOtherWindowMin(Wnd))
              {
                co_WinPosActivateOtherWindow(Wnd);
              }
          }
          else
          {
              co_WinPosActivateOtherWindow(Wnd);
          }
      }
 
      /* Revert focus to parent */
      if (Wnd == pti->MessageQueue->spwndFocus)
      {
         Parent = Wnd->spwndParent;
         if (UserIsDesktopWindow(Wnd->spwndParent))
             Parent = 0;
         co_UserSetFocus(Parent);
      }
      // Hide, just return.
      if (Cmd == SW_HIDE) return WasVisible;
   }
 
   /* FIXME: Check for window destruction. */
 
   if ((Wnd->state & WNDS_SENDSIZEMOVEMSGS) &&
       !(Wnd->state2 & WNDS2_INDESTROY))
   {
        co_WinPosSendSizeMove(Wnd);
   }
 
   /* if previous state was minimized Windows sets focus to the window */
   if (style & WS_MINIMIZE)
   {
      co_UserSetFocus(Wnd);
      // Fix wine Win test_SetFocus todo #3,
      if (!(style & WS_CHILD)) co_IntSendMessage(UserHMGetHandle(Wnd), WM_ACTIVATE, WA_ACTIVE, 0);
   }
   //ERR("co_WinPosShowWindow EXIT\n");
   return WasVisible;
}
 
static PWND
co_WinPosSearchChildren(
   IN PWND ScopeWin,
   IN POINT *Point,
   IN OUT USHORT *HitTest,
   IN BOOL Ignore
   )
{
    HWND *List, *phWnd;
    PWND pwndChild = NULL;
 
    /* not visible */
    if (!(ScopeWin->style & WS_VISIBLE))
    {
        return NULL;
    }
 
    /* not in window or in window region */
    if (!IntPtInWindow(ScopeWin, Point->x, Point->y))
    {
        return NULL;
    }
 
    /* transparent */
    if ((ScopeWin->ExStyle & (WS_EX_LAYERED|WS_EX_TRANSPARENT)) == (WS_EX_LAYERED|WS_EX_TRANSPARENT))
    {
        return NULL;
    }
 
    if (!Ignore && (ScopeWin->style & WS_DISABLED))
    {   /* disabled child */
        if ((ScopeWin->style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return NULL;
        /* process the hit error */
        *HitTest = HTERROR;
        return ScopeWin;
    }
 
    /* not minimized and check if point is inside the window */
    if (!(ScopeWin->style & WS_MINIMIZE) &&
         RECTL_bPointInRect(&ScopeWin->rcClient, Point->x, Point->y) )
    {
        UserReferenceObject(ScopeWin);
 
        List = IntWinListChildren(ScopeWin);
        if (List)
        {
            for (phWnd = List; *phWnd; ++phWnd)
            {
                if (!(pwndChild = ValidateHwndNoErr(*phWnd)))
                {
                    continue;
                }
 
                pwndChild = co_WinPosSearchChildren(pwndChild, Point, HitTest, Ignore);
 
                if (pwndChild != NULL)
                {
                    /* We found a window. Don't send any more WM_NCHITTEST messages */
                    ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
                    UserDereferenceObject(ScopeWin);
                    return pwndChild;
                }
            }
            ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
        }
        UserDereferenceObject(ScopeWin);
    }
 
    if (ScopeWin->head.pti == PsGetCurrentThreadWin32Thread())
    {
       *HitTest = (USHORT)co_IntSendMessage(UserHMGetHandle(ScopeWin), WM_NCHITTEST, 0, MAKELONG(Point->x, Point->y));
 
       if ((*HitTest) == (USHORT)HTTRANSPARENT)
       {
           return NULL;
       }
    }
    else
    {
       if (*HitTest == HTNOWHERE && pwndChild == NULL) *HitTest = HTCLIENT;
    }
 
    return ScopeWin;
}
 
PWND APIENTRY
co_WinPosWindowFromPoint(
   IN PWND ScopeWin,
   IN POINT *WinPoint,
   IN OUT USHORT* HitTest,
   IN BOOL Ignore)
{
   PWND Window;
   POINT Point = *WinPoint;
   USER_REFERENCE_ENTRY Ref;
 
   if( ScopeWin == NULL )
   {
       ScopeWin = UserGetDesktopWindow();
       if(ScopeWin == NULL)
           return NULL;
   }
 
   *HitTest = HTNOWHERE;
 
   ASSERT_REFS_CO(ScopeWin);
   UserRefObjectCo(ScopeWin, &Ref);
 
   Window = co_WinPosSearchChildren(ScopeWin, &Point, HitTest, Ignore);
 
   UserDerefObjectCo(ScopeWin);
   if (Window)
       ASSERT_REFS_CO(Window);
   ASSERT_REFS_CO(ScopeWin);
 
   return Window;
}
 
/* Win: _RealChildWindowFromPoint */
PWND FASTCALL
IntRealChildWindowFromPoint(PWND Parent, LONG x, LONG y)
{
   POINTL Pt;
   HWND *List, *phWnd;
   PWND pwndHit = NULL;
 
   Pt.x = x;
   Pt.y = y;
 
   if (!UserIsDesktopWindow(Parent))
   {
      Pt.x += Parent->rcClient.left;
      Pt.y += Parent->rcClient.top;
   }
 
   if (!IntPtInWindow(Parent, Pt.x, Pt.y)) return NULL;
 
   if ((List = IntWinListChildren(Parent)))
   {
      for (phWnd = List; *phWnd; phWnd++)
      {
         PWND Child;
         if ((Child = ValidateHwndNoErr(*phWnd)))
         {
            if ( Child->style & WS_VISIBLE && IntPtInWindow(Child, Pt.x, Pt.y) )
            {
               if ( Child->pcls->atomClassName != gpsi->atomSysClass[ICLS_BUTTON] ||
                   (Child->style & BS_TYPEMASK) != BS_GROUPBOX )
               {
                  ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
                  return Child;
               }
               pwndHit = Child;
            }
         }
      }
      ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
   }
   return pwndHit ? pwndHit : Parent;
}
 
/* Win: _ChildWindowFromPointEx */
PWND APIENTRY
IntChildWindowFromPointEx(PWND Parent, LONG x, LONG y, UINT uiFlags)
{
   POINTL Pt;
   HWND *List, *phWnd;
   PWND pwndHit = NULL;
 
   Pt.x = x;
   Pt.y = y;
 
   if (!UserIsDesktopWindow(Parent))
   {
      if (Parent->ExStyle & WS_EX_LAYOUTRTL)
         Pt.x = Parent->rcClient.right - Pt.x;
      else
         Pt.x += Parent->rcClient.left;
      Pt.y += Parent->rcClient.top;
   }
 
   if (!IntPtInWindow(Parent, Pt.x, Pt.y)) return NULL;
 
   if ((List = IntWinListChildren(Parent)))
   {
      for (phWnd = List; *phWnd; phWnd++)
      {
         PWND Child;
         if ((Child = ValidateHwndNoErr(*phWnd)))
         {
            if (uiFlags & (CWP_SKIPINVISIBLE|CWP_SKIPDISABLED))
            {
               if (!(Child->style & WS_VISIBLE) && (uiFlags & CWP_SKIPINVISIBLE)) continue;
               if ((Child->style & WS_DISABLED) && (uiFlags & CWP_SKIPDISABLED)) continue;
            }
 
            if (uiFlags & CWP_SKIPTRANSPARENT)
            {
               if (Child->ExStyle & WS_EX_TRANSPARENT) continue;
            }
 
            if (IntPtInWindow(Child, Pt.x, Pt.y))
            {
               pwndHit = Child;
               break;
            }
         }
      }
      ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
   }
   return pwndHit ? pwndHit : Parent;
}
 
/* Win: _DeferWindowPos(PSMWP, PWND, PWND, ...) */
HDWP
FASTCALL
IntDeferWindowPos( HDWP hdwp,
                   HWND hwnd,
                   HWND hwndAfter,
                   INT x,
                   INT y,
                   INT cx,
                   INT cy,
                   UINT flags )
{
    PSMWP pDWP;
    int i;
    HDWP retvalue = hdwp;
 
    TRACE("hdwp %p, hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
          hdwp, hwnd, hwndAfter, x, y, cx, cy, flags);
 
    if (flags & ~(SWP_NOSIZE | SWP_NOMOVE |
                  SWP_NOZORDER | SWP_NOREDRAW |
                  SWP_NOACTIVATE | SWP_NOCOPYBITS |
                  SWP_NOOWNERZORDER|SWP_SHOWWINDOW |
                  SWP_HIDEWINDOW | SWP_FRAMECHANGED))
    {
       EngSetLastError(ERROR_INVALID_PARAMETER);
       return NULL;
    }
 
    if (!(pDWP = (PSMWP)UserGetObject(gHandleTable, hdwp, TYPE_SETWINDOWPOS)))
    {
       EngSetLastError(ERROR_INVALID_DWP_HANDLE);
       return NULL;
    }
 
    for (i = 0; i < pDWP->ccvr; i++)
    {
        if (pDWP->acvr[i].pos.hwnd == hwnd)
        {
              /* Merge with the other changes */
            if (!(flags & SWP_NOZORDER))
            {
                pDWP->acvr[i].pos.hwndInsertAfter = hwndAfter;
            }
            if (!(flags & SWP_NOMOVE))
            {
                pDWP->acvr[i].pos.x = x;
                pDWP->acvr[i].pos.y = y;
            }
            if (!(flags & SWP_NOSIZE))
            {
                pDWP->acvr[i].pos.cx = cx;
                pDWP->acvr[i].pos.cy = cy;
            }
            pDWP->acvr[i].pos.flags &= flags | ~(SWP_NOSIZE | SWP_NOMOVE |
                                               SWP_NOZORDER | SWP_NOREDRAW |
                                               SWP_NOACTIVATE | SWP_NOCOPYBITS|
                                               SWP_NOOWNERZORDER);
            pDWP->acvr[i].pos.flags |= flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW |
                                              SWP_FRAMECHANGED);
            goto END;
        }
    }
    if (pDWP->ccvr >= pDWP->ccvrAlloc)
    {
        PCVR newpos = ExAllocatePoolWithTag(PagedPool, pDWP->ccvrAlloc * 2 * sizeof(CVR), USERTAG_SWP);
        if (!newpos)
        {
            retvalue = NULL;
            goto END;
        }
        RtlZeroMemory(newpos, pDWP->ccvrAlloc * 2 * sizeof(CVR));
        RtlCopyMemory(newpos, pDWP->acvr, pDWP->ccvrAlloc * sizeof(CVR));
        ExFreePoolWithTag(pDWP->acvr, USERTAG_SWP);
        pDWP->ccvrAlloc *= 2;
        pDWP->acvr = newpos;
    }
    pDWP->acvr[pDWP->ccvr].pos.hwnd = hwnd;
    pDWP->acvr[pDWP->ccvr].pos.hwndInsertAfter = hwndAfter;
    pDWP->acvr[pDWP->ccvr].pos.x = x;
    pDWP->acvr[pDWP->ccvr].pos.y = y;
    pDWP->acvr[pDWP->ccvr].pos.cx = cx;
    pDWP->acvr[pDWP->ccvr].pos.cy = cy;
    pDWP->acvr[pDWP->ccvr].pos.flags = flags;
    pDWP->acvr[pDWP->ccvr].hrgnClip = NULL;
    pDWP->acvr[pDWP->ccvr].hrgnInterMonitor = NULL;
    pDWP->ccvr++;
END:
    return retvalue;
}
 
/* Win: xxxEndDeferWindowPosEx */
BOOL FASTCALL IntEndDeferWindowPosEx(HDWP hdwp, BOOL bAsync)
{
    PSMWP pDWP;
    PCVR winpos;
    BOOL res = TRUE;
    int i;
 
    TRACE("%p\n", hdwp);
 
    if (!(pDWP = (PSMWP)UserGetObject(gHandleTable, hdwp, TYPE_SETWINDOWPOS)))
    {
       EngSetLastError(ERROR_INVALID_DWP_HANDLE);
       return FALSE;
    }
 
    for (i = 0, winpos = pDWP->acvr; res && i < pDWP->ccvr; i++, winpos++)
    {
        PWND pwnd;
        USER_REFERENCE_ENTRY Ref;
 
        TRACE("hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
               winpos->pos.hwnd, winpos->pos.hwndInsertAfter, winpos->pos.x, winpos->pos.y,
               winpos->pos.cx, winpos->pos.cy, winpos->pos.flags);
 
        pwnd = ValidateHwndNoErr(winpos->pos.hwnd);
        if (!pwnd)
           continue;
 
        UserRefObjectCo(pwnd, &Ref);
 
        if (bAsync)
        {
           LRESULT lRes;
           PWINDOWPOS ppos = ExAllocatePoolWithTag(PagedPool, sizeof(WINDOWPOS), USERTAG_SWP);
           if ( ppos )
           {
              *ppos = winpos->pos;
              /* Yes it's a pointer inside Win32k! */
              lRes = co_IntSendMessageNoWait( winpos->pos.hwnd, WM_ASYNC_SETWINDOWPOS, 0, (LPARAM)ppos);
              /* We handle this the same way as Event Hooks and Hooks. */
              if ( !lRes )
              {
                 ExFreePoolWithTag(ppos, USERTAG_SWP);
              }
           }
        }
        else
           res = co_WinPosSetWindowPos( pwnd,
                                        winpos->pos.hwndInsertAfter,
                                        winpos->pos.x,
                                        winpos->pos.y,
                                        winpos->pos.cx,
                                        winpos->pos.cy,
                                        winpos->pos.flags);
 
        // Hack to pass tests.... Must have some work to do so clear the error.
        if (res && (winpos->pos.flags & (SWP_NOMOVE|SWP_NOSIZE|SWP_NOZORDER)) == SWP_NOZORDER )
           EngSetLastError(ERROR_SUCCESS);
 
        UserDerefObjectCo(pwnd);
    }
 
    ExFreePoolWithTag(pDWP->acvr, USERTAG_SWP);
    UserDereferenceObject(pDWP);
    UserDeleteObject(hdwp, TYPE_SETWINDOWPOS);
    return res;
}
 
/*
 * @implemented
 */
HWND APIENTRY
NtUserChildWindowFromPointEx(HWND hwndParent,
                             LONG x,
                             LONG y,
                             UINT uiFlags)
{
   PWND pwndParent;
   TRACE("Enter NtUserChildWindowFromPointEx\n");
   UserEnterExclusive();
   if ((pwndParent = UserGetWindowObject(hwndParent)))
   {
      pwndParent = IntChildWindowFromPointEx(pwndParent, x, y, uiFlags);
   }
   UserLeave();
   TRACE("Leave NtUserChildWindowFromPointEx\n");
   return pwndParent ? UserHMGetHandle(pwndParent) : NULL;
}
 
/*
 * @implemented
 */
BOOL APIENTRY
NtUserEndDeferWindowPosEx(HDWP WinPosInfo,
                          BOOL bAsync)
{
   BOOL Ret;
   TRACE("Enter NtUserEndDeferWindowPosEx\n");
   UserEnterExclusive();
   Ret = IntEndDeferWindowPosEx(WinPosInfo, bAsync);
   TRACE("Leave NtUserEndDeferWindowPosEx, ret=%i\n", Ret);
   UserLeave();
   return Ret;
}
 
/*
 * @implemented
 */
HDWP APIENTRY
NtUserDeferWindowPos(HDWP WinPosInfo,
                     HWND Wnd,
                     HWND WndInsertAfter,
                     int x,
                     int y,
                     int cx,
                     int cy,
                     UINT Flags)
{
   PWND pWnd, pWndIA;
   HDWP Ret = NULL;
   UINT Tmp = ~(SWP_ASYNCWINDOWPOS|SWP_DEFERERASE|SWP_NOSENDCHANGING|SWP_NOREPOSITION|
                SWP_NOCOPYBITS|SWP_HIDEWINDOW|SWP_SHOWWINDOW|SWP_FRAMECHANGED|
                SWP_NOACTIVATE|SWP_NOREDRAW|SWP_NOZORDER|SWP_NOMOVE|SWP_NOSIZE);
 
   TRACE("Enter NtUserDeferWindowPos\n");
   UserEnterExclusive();
 
   if ( Flags & Tmp )
   {
      EngSetLastError(ERROR_INVALID_FLAGS);
      goto Exit;
   }
 
   pWnd = UserGetWindowObject(Wnd);
   if (!pWnd || UserIsDesktopWindow(pWnd) || UserIsMessageWindow(pWnd))
   {
      goto Exit;
   }
 
   if ( WndInsertAfter &&
        WndInsertAfter != HWND_BOTTOM &&
        WndInsertAfter != HWND_TOPMOST &&
        WndInsertAfter != HWND_NOTOPMOST )
   {
      pWndIA = UserGetWindowObject(WndInsertAfter);
      if (!pWndIA || UserIsDesktopWindow(pWndIA) || UserIsMessageWindow(pWndIA))
      {
         goto Exit;
      }
   }
 
   Ret = IntDeferWindowPos(WinPosInfo, Wnd, WndInsertAfter, x, y, cx, cy, Flags);
 
Exit:
   TRACE("Leave NtUserDeferWindowPos, ret=%p\n", Ret);
   UserLeave();
   return Ret;
}
 
/*
 * @implemented
 */
DWORD APIENTRY
NtUserGetInternalWindowPos( HWND hWnd,
                            LPRECT rectWnd,
                            LPPOINT ptIcon)
{
   PWND Window;
   DWORD Ret = 0;
   BOOL Hit = FALSE;
   WINDOWPLACEMENT wndpl;
 
   UserEnterShared();
 
   if (!(Window = UserGetWindowObject(hWnd)))
   {
      Hit = FALSE;
      goto Exit;
   }
 
   _SEH2_TRY
   {
       if(rectWnd)
       {
          ProbeForWrite(rectWnd,
                        sizeof(RECT),
                        1);
       }
       if(ptIcon)
       {
          ProbeForWrite(ptIcon,
                        sizeof(POINT),
                        1);
       }
 
   }
   _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
   {
       SetLastNtError(_SEH2_GetExceptionCode());
       Hit = TRUE;
   }
   _SEH2_END;
 
   wndpl.length = sizeof(WINDOWPLACEMENT);
 
   if (IntGetWindowPlacement(Window, &wndpl) && !Hit)
   {
      _SEH2_TRY
      {
          if (rectWnd)
          {
             RtlCopyMemory(rectWnd, &wndpl.rcNormalPosition , sizeof(RECT));
          }
          if (ptIcon)
          {
             RtlCopyMemory(ptIcon, &wndpl.ptMinPosition, sizeof(POINT));
          }
 
      }
      _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
      {
          SetLastNtError(_SEH2_GetExceptionCode());
          Hit = TRUE;
      }
      _SEH2_END;
 
      if (!Hit) Ret = wndpl.showCmd;
   }
Exit:
   UserLeave();
   return Ret;
}
 
/*
 * @implemented
 */
BOOL APIENTRY
NtUserGetWindowPlacement(HWND hWnd,
                         WINDOWPLACEMENT *lpwndpl)
{
   PWND Wnd;
   WINDOWPLACEMENT Safepl;
   NTSTATUS Status;
   BOOL Ret = FALSE;
 
   TRACE("Enter NtUserGetWindowPlacement\n");
   UserEnterShared();
 
   if (!(Wnd = UserGetWindowObject(hWnd)))
      goto Exit; // Return FALSE
 
   Status = MmCopyFromCaller(&Safepl, lpwndpl, sizeof(WINDOWPLACEMENT));
   if (!NT_SUCCESS(Status))
   {
      SetLastNtError(Status);
      goto Exit; // Return FALSE
   }
 
   // This function doesn't check the length. Just overwrite it
   Safepl.length = sizeof(WINDOWPLACEMENT);
 
   IntGetWindowPlacement(Wnd, &Safepl);
 
   Status = MmCopyToCaller(lpwndpl, &Safepl, sizeof(WINDOWPLACEMENT));
   if (!NT_SUCCESS(Status))
   {
      SetLastNtError(Status);
      goto Exit; // Return FALSE
   }
 
   Ret = TRUE;
 
Exit:
   TRACE("Leave NtUserGetWindowPlacement, ret=%i\n", Ret);
   UserLeave();
   return Ret;
}
 
DWORD
APIENTRY
NtUserMinMaximize(
    HWND hWnd,
    UINT cmd, // Wine SW_ commands
    BOOL Hide)
{
  PWND pWnd;
 
  TRACE("Enter NtUserMinMaximize\n");
  UserEnterExclusive();
 
  pWnd = UserGetWindowObject(hWnd);
  if (!pWnd || UserIsDesktopWindow(pWnd) || UserIsMessageWindow(pWnd))
  {
     goto Exit;
  }
 
  if ( cmd > SW_MAX || pWnd->state2 & WNDS2_INDESTROY)
  {
     EngSetLastError(ERROR_INVALID_PARAMETER);
     goto Exit;
  }
 
  cmd |= Hide ? SW_HIDE : 0;
 
  co_WinPosShowWindow(pWnd, cmd);
 
Exit:
  TRACE("Leave NtUserMinMaximize\n");
  UserLeave();
  return 0; // Always NULL?
}
 
/*
 * @implemented
 */
BOOL APIENTRY
NtUserMoveWindow(
   HWND hWnd,
   int X,
   int Y,
   int nWidth,
   int nHeight,
   BOOL bRepaint)
{
   return NtUserSetWindowPos(hWnd, 0, X, Y, nWidth, nHeight,
                             (bRepaint ? SWP_NOZORDER | SWP_NOACTIVATE :
                              SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW));
}
 
/*
 * @implemented
 */
HWND APIENTRY
NtUserRealChildWindowFromPoint(HWND Parent,
                               LONG x,
                               LONG y)
{
   PWND pwndParent;
   TRACE("Enter NtUserRealChildWindowFromPoint\n");
   UserEnterShared();
   if ((pwndParent = UserGetWindowObject(Parent)))
   {
      pwndParent = IntRealChildWindowFromPoint(pwndParent, x, y);
   }
   UserLeave();
   TRACE("Leave NtUserRealChildWindowFromPoint\n");
   return pwndParent ? UserHMGetHandle(pwndParent) : NULL;
}
 
/*
 * @implemented
 */
BOOL APIENTRY
NtUserSetWindowPos(
   HWND hWnd,
   HWND hWndInsertAfter,
   int X,
   int Y,
   int cx,
   int cy,
   UINT uFlags)
{
   PWND Window, pWndIA;
   BOOL ret = FALSE;
   USER_REFERENCE_ENTRY Ref;
 
   TRACE("Enter NtUserSetWindowPos\n");
   UserEnterExclusive();
 
   if (!(Window = UserGetWindowObject(hWnd)) ||
        UserIsDesktopWindow(Window) || UserIsMessageWindow(Window))
   {
      ERR("NtUserSetWindowPos bad window handle!\n");
      goto Exit; // Return FALSE
   }
 
   if ( hWndInsertAfter != HWND_TOP &&
        hWndInsertAfter != HWND_BOTTOM &&
        hWndInsertAfter != HWND_TOPMOST &&
        hWndInsertAfter != HWND_NOTOPMOST )
   {
      if (!(pWndIA = UserGetWindowObject(hWndInsertAfter)) ||
            UserIsDesktopWindow(pWndIA) || UserIsMessageWindow(pWndIA))
      {
         ERR("NtUserSetWindowPos bad insert window handle!\n");
         goto Exit; // Return FALSE
      }
   }
 
   /* First make sure that coordinates are valid for WM_WINDOWPOSCHANGING */
   if (!(uFlags & SWP_NOMOVE))
   {
      if (X < -32768) X = -32768;
      else if (X > 32767) X = 32767;
      if (Y < -32768) Y = -32768;
      else if (Y > 32767) Y = 32767;
   }
   if (!(uFlags & SWP_NOSIZE))
   {
      if (cx < 0) cx = 0;
      else if (cx > 32767) cx = 32767;
      if (cy < 0) cy = 0;
      else if (cy > 32767) cy = 32767;
   }
 
   UserRefObjectCo(Window, &Ref);
   ret = co_WinPosSetWindowPos(Window, hWndInsertAfter, X, Y, cx, cy, uFlags);
   UserDerefObjectCo(Window);
 
Exit:
   TRACE("Leave NtUserSetWindowPos, ret=%i\n", ret);
   UserLeave();
   return ret;
}
 
/*
 * @implemented
 */
INT APIENTRY
NtUserSetWindowRgn(
   HWND hWnd,
   HRGN hRgn,
   BOOL bRedraw)
{
   HRGN hrgnCopy = NULL;
   PWND Window;
   INT flags = (SWP_NOCLIENTSIZE|SWP_NOCLIENTMOVE|SWP_NOACTIVATE|SWP_FRAMECHANGED|SWP_NOSIZE|SWP_NOMOVE);
   INT Ret = 0;
 
   TRACE("Enter NtUserSetWindowRgn\n");
   UserEnterExclusive();
 
   if (!(Window = UserGetWindowObject(hWnd)) ||
        UserIsDesktopWindow(Window) || UserIsMessageWindow(Window))
   {
      goto Exit; // Return 0
   }
 
   if (hRgn) // The region will be deleted in user32.
   {
      if (GreIsHandleValid(hRgn))
      {
         hrgnCopy = NtGdiCreateRectRgn(0, 0, 0, 0);
      /* The coordinates of a window's window region are relative to the
         upper-left corner of the window, not the client area of the window. */
         NtGdiCombineRgn( hrgnCopy, hRgn, 0, RGN_COPY);
      }
      else
         goto Exit; // Return 0
   }
 
   if (hrgnCopy)
   {
       Window->hrgnNewFrame = hrgnCopy; // Should be PSMWP->acvr->hrgnClip
   }
   else
   {
       Window->hrgnNewFrame = HRGN_WINDOW;
   }
   Ret = (INT)co_WinPosSetWindowPos(Window, HWND_TOP, 0, 0, 0, 0, bRedraw ? flags : (flags | SWP_NOREDRAW));
 
Exit:
   TRACE("Leave NtUserSetWindowRgn, ret=%i\n", Ret);
   UserLeave();
   return Ret;
}
 
/*
 * @implemented
 */
DWORD APIENTRY
NtUserSetInternalWindowPos(
   HWND    hwnd,
   UINT    showCmd,
   LPRECT  lprect,
   LPPOINT lppt)
{
   WINDOWPLACEMENT wndpl;
   UINT flags;
   PWND Wnd;
   RECT rect;
   POINT pt = {0};
   BOOL Ret = FALSE;
   USER_REFERENCE_ENTRY Ref;
 
   TRACE("Enter NtUserSetWindowPlacement\n");
   UserEnterExclusive();
 
   if (!(Wnd = UserGetWindowObject(hwnd)) || // FIXME:
        UserIsDesktopWindow(Wnd) || UserIsMessageWindow(Wnd))
   {
      goto Exit; // Return FALSE
   }
 
   _SEH2_TRY
   {
      if (lppt)
      {
         ProbeForRead(lppt, sizeof(POINT), 1);
         RtlCopyMemory(&pt, lppt, sizeof(POINT));
      }
      if (lprect)
      {
         ProbeForRead(lprect, sizeof(RECT), 1);
         RtlCopyMemory(&rect, lprect, sizeof(RECT));
      }
   }
   _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
   {
      SetLastNtError(_SEH2_GetExceptionCode());
      _SEH2_YIELD(goto Exit); // Return FALSE
   }
   _SEH2_END
 
   wndpl.length  = sizeof(wndpl);
   wndpl.showCmd = showCmd;
   wndpl.flags = flags = 0;
 
   if ( lppt )
   {
      flags |= PLACE_MIN;
      wndpl.flags |= WPF_SETMINPOSITION;
      wndpl.ptMinPosition = pt;
   }
   if ( lprect )
   {
      flags |= PLACE_RECT;
      wndpl.rcNormalPosition = rect;
   }
 
   UserRefObjectCo(Wnd, &Ref);
   IntSetWindowPlacement(Wnd, &wndpl, flags);
   UserDerefObjectCo(Wnd);
   Ret = TRUE;
 
Exit:
   TRACE("Leave NtUserSetWindowPlacement, ret=%i\n", Ret);
   UserLeave();
   return Ret;
}
 
/*
 * @implemented
 */
BOOL APIENTRY
NtUserSetWindowPlacement(HWND hWnd,
                         WINDOWPLACEMENT *lpwndpl)
{
   PWND Wnd;
   WINDOWPLACEMENT Safepl;
   UINT Flags;
   BOOL Ret = FALSE;
   USER_REFERENCE_ENTRY Ref;
 
   TRACE("Enter NtUserSetWindowPlacement\n");
   UserEnterExclusive();
 
    _SEH2_TRY
    {
        ProbeForRead(lpwndpl, sizeof(*lpwndpl), 1);
        Safepl = *lpwndpl;
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        SetLastNtError(_SEH2_GetExceptionCode());
        _SEH2_YIELD(goto Exit); // Return FALSE
    }
    _SEH2_END
 
    /* Backwards-compatibility: Win 3.x doesn't check the length */
    if (LOWORD(gptiCurrent->dwExpWinVer) < WINVER_WINNT4)
        Safepl.length = sizeof(Safepl);
 
    if (Safepl.length != sizeof(Safepl))
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        goto Exit;
    }
 
    Flags = PLACE_MAX | PLACE_RECT;
    if (Safepl.flags & WPF_SETMINPOSITION)
        Flags |= PLACE_MIN;
 
    Wnd = UserGetWindowObject(hWnd);
    if (!Wnd)
        goto Exit; // Return FALSE
 
    UserRefObjectCo(Wnd, &Ref);
    if (!UserIsDesktopWindow(Wnd) && !UserIsMessageWindow(Wnd))
        Ret = IntSetWindowPlacement(Wnd, &Safepl, Flags);
    UserDerefObjectCo(Wnd);
 
Exit:
   TRACE("Leave NtUserSetWindowPlacement, ret=%i\n", Ret);
   UserLeave();
   return Ret;
}
 
/*
 * @implemented
 */
BOOL APIENTRY
NtUserShowWindowAsync(HWND hWnd, LONG nCmdShow)
{
   PWND Window;
   LRESULT Result;
   BOOL ret = FALSE;
   USER_REFERENCE_ENTRY Ref;
 
   TRACE("Enter NtUserShowWindowAsync\n");
   UserEnterExclusive();
 
   if (!(Window = UserGetWindowObject(hWnd)) ||
        UserIsDesktopWindow(Window) || UserIsMessageWindow(Window))
   {
      goto Exit; // Return FALSE
   }
 
   if ( nCmdShow > SW_MAX )
   {
      EngSetLastError(ERROR_INVALID_PARAMETER);
      goto Exit; // Return FALSE
   }
 
   UserRefObjectCo(Window, &Ref);
   Result = co_IntSendMessageNoWait( hWnd, WM_ASYNC_SHOWWINDOW, nCmdShow, 0 );
   UserDerefObjectCo(Window);
   if (Result != -1 && Result != 0) ret = TRUE;
 
Exit:
   TRACE("Leave NtUserShowWindowAsync, ret=%i\n", ret);
   UserLeave();
   return ret;
}
 
/*
 * @implemented
 */
BOOL APIENTRY
NtUserShowWindow(HWND hWnd, LONG nCmdShow)
{
   PWND Window;
   BOOL ret = FALSE;
   USER_REFERENCE_ENTRY Ref;
 
   TRACE("Enter NtUserShowWindow hWnd %p SW_ %d\n",hWnd, nCmdShow);
   UserEnterExclusive();
 
   if (!(Window = UserGetWindowObject(hWnd)) ||
        UserIsDesktopWindow(Window) || UserIsMessageWindow(Window))
   {
      goto Exit; // Return FALSE
   }
 
   if ( nCmdShow > SW_MAX || Window->state2 & WNDS2_INDESTROY)
   {
      EngSetLastError(ERROR_INVALID_PARAMETER);
      goto Exit; // Return FALSE
   }
 
   UserRefObjectCo(Window, &Ref);
   ret = co_WinPosShowWindow(Window, nCmdShow);
   UserDerefObjectCo(Window);
 
Exit:
   TRACE("Leave NtUserShowWindow, ret=%i\n", ret);
   UserLeave();
   return ret;
}
 
 
/*
 *    @implemented
 */
HWND APIENTRY
NtUserWindowFromPoint(LONG X, LONG Y)
{
   POINT pt;
   HWND Ret = NULL;
   PWND DesktopWindow, Window;
   USHORT hittest;
   USER_REFERENCE_ENTRY Ref;
 
   TRACE("Enter NtUserWindowFromPoint\n");
   UserEnterExclusive();
 
   if ((DesktopWindow = UserGetWindowObject(IntGetDesktopWindow())))
   {
      //PTHREADINFO pti;
 
      pt.x = X;
      pt.y = Y;
 
      // Hmm... Threads live on desktops thus we have a reference on the desktop and indirectly the desktop window.
      // It is possible this referencing is useless, though it should not hurt...
      UserRefObjectCo(DesktopWindow, &Ref);
 
      //pti = PsGetCurrentThreadWin32Thread();
      Window = co_WinPosWindowFromPoint(DesktopWindow, &pt, &hittest, FALSE);
      if (Window)
      {
         Ret = UserHMGetHandle(Window);
      }
 
      UserDerefObjectCo(DesktopWindow);
   }
 
   TRACE("Leave NtUserWindowFromPoint, ret=%p\n", Ret);
   UserLeave();
   return Ret;
}
 
/* Windows 10 (1903?)
BOOL APIENTRY
NtUserIsWindowArranged(HWND hWnd)
{
    PWND pwnd = UserGetWindowObject(hWnd);
    return pwnd && IntIsWindowSnapped(pwnd);
}
*/
 
UINT FASTCALL
IntGetWindowSnapEdge(PWND Wnd)
{
    if (Wnd->ExStyle2 & WS_EX2_VERTICALLYMAXIMIZEDLEFT) return HTLEFT;
    if (Wnd->ExStyle2 & WS_EX2_VERTICALLYMAXIMIZEDRIGHT) return HTRIGHT;
    return HTNOWHERE;
}
 
VOID FASTCALL
co_IntCalculateSnapPosition(PWND Wnd, UINT Edge, OUT RECT *Pos)
{
    POINT maxs, mint, maxt;
    UINT width, height;
    UserSystemParametersInfo(SPI_GETWORKAREA, 0, Pos, 0); /* FIXME: MultiMon of PWND */
 
    co_WinPosGetMinMaxInfo(Wnd, &maxs, NULL, &mint, &maxt);
    width = Pos->right - Pos->left;
    width = min(min(max(width / 2, mint.x), maxt.x), width);
    height = Pos->bottom - Pos->top;
    height = min(max(height, mint.y), maxt.y);
 
    switch (Edge)
    {
    case HTTOP: /* Maximized (Calculate RECT snap preview for SC_MOVE) */
        height = min(Pos->bottom - Pos->top, maxs.y);
        break; 
    case HTLEFT:
        Pos->right = width;
        break;
    case HTRIGHT:
        Pos->left = Pos->right - width;
        break;
    default:
        ERR("Unexpected snap edge %#x\n", Edge);
    }
    Pos->bottom = Pos->top + height;
}
 
VOID FASTCALL
co_IntSnapWindow(PWND Wnd, UINT Edge)
{
    RECT newPos;
    BOOLEAN wasSnapped = IntIsWindowSnapped(Wnd);
    UINT normal = !(Wnd->style & (WS_MAXIMIZE | WS_MINIMIZE));
    USER_REFERENCE_ENTRY ref;
    BOOLEAN hasRef = FALSE;
 
    if (Edge == HTTOP)
    {
        co_IntSendMessage(UserHMGetHandle(Wnd), WM_SYSCOMMAND, SC_MAXIMIZE, 0);
        return;
    }
    else if (Edge != HTNOWHERE)
    {
        UserRefObjectCo(Wnd, &ref);
        hasRef = TRUE;
        co_IntCalculateSnapPosition(Wnd, Edge, &newPos);
        IntSetSnapInfo(Wnd, Edge, (wasSnapped || !normal) ? NULL : &Wnd->rcWindow);
    }
    else if (wasSnapped)
    {
        if (!normal)
        {
            IntSetSnapEdge(Wnd, HTNOWHERE);
            return;
        }
        newPos = Wnd->InternalPos.NormalRect; /* Copy RECT now before it is lost */
        IntSetSnapInfo(Wnd, HTNOWHERE, NULL);
    }
    else
    {
        return; /* Already unsnapped, do nothing */
    }
 
    TRACE("WindowSnap: %d->%d\n", IntGetWindowSnapEdge(Wnd), Edge);
    co_WinPosSetWindowPos(Wnd, HWND_TOP,
                          newPos.left,
                          newPos.top,
                          newPos.right - newPos.left,
                          newPos.bottom - newPos.top,
                          0);
    if (hasRef)
        UserDerefObjectCo(Wnd);
}
 
VOID FASTCALL
IntSetSnapEdge(PWND Wnd, UINT Edge)
{
    UINT styleMask = WS_EX2_VERTICALLYMAXIMIZEDLEFT | WS_EX2_VERTICALLYMAXIMIZEDRIGHT;
    UINT style = 0;
    switch (Edge)
    {
    case HTNOWHERE:
        style = 0;
        break;
    case HTTOP: /* Maximize throws away the snap */
        style = 0;
        break;
    case HTLEFT:
        style = WS_EX2_VERTICALLYMAXIMIZEDLEFT;
        break;
    case HTRIGHT:
        style = WS_EX2_VERTICALLYMAXIMIZEDRIGHT;
        break;
    default:
        ERR("Unexpected snap edge %#x\n", Edge);
    }
    Wnd->ExStyle2 = (Wnd->ExStyle2 & ~styleMask) | style;
}
 
VOID FASTCALL
IntSetSnapInfo(PWND Wnd, UINT Edge, IN const RECT *Pos OPTIONAL)
{
    RECT r;
    IntSetSnapEdge(Wnd, Edge);
    if (Edge == HTNOWHERE)
    {
        RECTL_vSetEmptyRect(&r);
        Pos = (Wnd->style & WS_MINIMIZE) ? NULL : &r;
    }
    if (Pos)
    {
        Wnd->InternalPos.NormalRect = *Pos;
    }
}
 
/* EOF */