INT FASTCALL co_UserGetUpdateRgn	(	PWND	,
		HRGN	,
		BOOL
	)

Definition at line 1016 of file painting.c.

Referenced by IntDispatchMessage(), NtUserGetUpdateRgn(), and NtUserScrollWindowEx().

{
   int RegionType;
   RECTL Rect;

   ASSERT_REFS_CO(Window);

   if (Window->hrgnUpdate == NULL)
   {
      RegionType = (NtGdiSetRectRgn(hRgn, 0, 0, 0, 0) ? NULLREGION : ERROR);
   }
   else
   {
      Rect = Window->rcClient;
      IntIntersectWithParents(Window, &Rect);
      NtGdiSetRectRgn(hRgn, Rect.left, Rect.top, Rect.right, Rect.bottom);
      RegionType = NtGdiCombineRgn(hRgn, hRgn, Window->hrgnUpdate, RGN_AND);
      NtGdiOffsetRgn(hRgn, -Window->rcClient.left, -Window->rcClient.top);
   }

   if (bErase && RegionType != NULLREGION && RegionType != ERROR)
   {
      co_UserRedrawWindow(Window, NULL, NULL, RDW_ERASENOW | RDW_NOCHILDREN);
   }

   return RegionType;
}

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