INT Test_GetClipRgn(PTESTINFO pti) { HWND hWnd; HDC hDC; HRGN hrgn;//, hrgn2; /* Create a window */ hWnd = CreateWindowW(L"BUTTON", L"TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, 100, 100, NULL, NULL, g_hInstance, 0); hDC = GetDC(hWnd); hrgn = CreateRectRgn(0,0,0,0); SetLastError(ERROR_SUCCESS); // TEST(GetClipRgn(hDC) ReleaseDC(hWnd, hDC); DestroyWindow(hWnd); return APISTATUS_NORMAL; }