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WinQueryVisibleRegion: Revision history

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9 April 2025

  • curprev 18:2618:26, 9 April 2025 Martini talk contribs 950 bytes +950 Created page with "This function is similar to WinQueryUpdateRegion. It returns a region which could be NULL, rectangular, or complex, and represents the visible region of the window. ==Syntax== WinQueryVisibleRegion(hwnd, hrgn) ==Parameters== ;hwnd (HWND) - Input : The window handle. ;hrgn (HRGN) - Input : Region handle to receive the current visible region. ==Returns== ;ulretn (ULONG) - returns : RGN_ERROR An error occurred. : RGN_NULL The window currently has no visi..."
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