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UpdateWindow info  Overview  Group


The UpdateWindow function updates the client area of the specified window by sending a WM_PAINT message to the window if the window’s update region is not empty. The function sends a WM_PAINT message directly to the window procedure of the specified window, bypassing the application queue. If the update region is empty, no message is sent.

BOOL UpdateWindow(

    HWND hWnd 

// handle of window

   );

Parameters

hWnd
Identifies the window to be updated.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

See Also

ExcludeUpdateRgn, GetUpdateRect, GetUpdateRgn, InvalidateRect, InvalidateRgn, WM_PAINT

See also:

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