ScrollBarWndExtra.c File Reference

#include "precomp.h"

Include dependency graph for ScrollBarWndExtra.c:

Go to the source code of this file.

Macros
#define	BUILTIN_SCROLLBAR   "Scrollbar"
#define	CUSTOM_SCROLLBAR   "MSScrollBarClass"

Functions
	START_TEST (ScrollBarWndExtra)

Macro Definition Documentation

BUILTIN_SCROLLBAR

#define BUILTIN_SCROLLBAR   "Scrollbar"

Definition at line 13 of file ScrollBarWndExtra.c.

CUSTOM_SCROLLBAR

#define CUSTOM_SCROLLBAR   "MSScrollBarClass"

Definition at line 14 of file ScrollBarWndExtra.c.

Function Documentation

START_TEST()

START_TEST

(

ScrollBarWndExtra

)

Definition at line 18 of file ScrollBarWndExtra.c.

{
    HWND hScrollBar;
    HWND hScrollBarImpersonator;
    WNDCLASSA WndClass;
    ATOM ClassAtom;
 
    LONG_PTR dummyData = (LONG_PTR)0xbeefbeefbeefbeefULL, result;
    WNDPROC lpfnWndProc;
    DWORD dwExtra;
 
    hScrollBar = CreateWindowExA(0, BUILTIN_SCROLLBAR, "", WS_POPUP,
                                 20, 20, 120, 120, NULL, 0, GetModuleHandle(NULL), 0);
 
    ok(hScrollBar != NULL, "Scrollbar creation failed (%lu)\n", GetLastError());
 
    lpfnWndProc = (WNDPROC)GetWindowLongPtrA(hScrollBar, GWL_WNDPROC);
    dwExtra = GetClassLongPtrA(hScrollBar, GCL_CBWNDEXTRA);
 
    ZeroMemory(&WndClass, sizeof(WndClass));
    WndClass.style = CS_DBLCLKS | CS_PARENTDC | CS_HREDRAW | CS_VREDRAW;
    WndClass.lpfnWndProc = lpfnWndProc;
    WndClass.cbWndExtra = dwExtra + sizeof(LONG_PTR);
    WndClass.hInstance = GetModuleHandle(NULL);
    WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
    WndClass.hbrBackground = GetStockObject(LTGRAY_BRUSH);
    WndClass.lpszClassName = CUSTOM_SCROLLBAR;
    ClassAtom = RegisterClassA(&WndClass);
 
    ok(ClassAtom != 0, "RegisterClassA failed (%lu)\n", GetLastError());
    DestroyWindow(hScrollBar);
 
 
    hScrollBarImpersonator = CreateWindowExA(0, CUSTOM_SCROLLBAR, "", WS_POPUP,
                                             20, 20, 120, 120, NULL, 0, GetModuleHandle(NULL), 0);
    ok(hScrollBarImpersonator != NULL, "Scrollbar creation failed (%lu)\n", GetLastError());
 
    SetWindowLongPtrA(hScrollBarImpersonator, dwExtra, dummyData);
    result = GetWindowLongPtrA(hScrollBarImpersonator, dwExtra);
    ok(result == dummyData, "Invalid dummyData\n");
 
    DestroyWindow(hScrollBarImpersonator);
    UnregisterClassA(CUSTOM_SCROLLBAR, GetModuleHandle(NULL));
}