The WM_WINDOWPOSCHANGED message is sent to a window whose size, position, or place in the Z order has changed as a result of a call to the SetWindowPos function or another window-management function.
WM_WINDOWPOSCHANGED lpwp = (LPWINDOWPOS) lParam; // points to size and position data
If an application processes this message, it should return zero.
The DefWindowProc function sends the WM_SIZE and WM_MOVE messages to the window.
The WM_SIZE and WM_MOVE messages are not sent if an application handles the WM_WINDOWPOSCHANGED message without calling DefWindowProc. It is more efficient to perform any move or size change processing during the WM_WINDOWPOSCHANGED message without calling DefWindowProc.
DefWindowProc, EndDeferWindowPos, SetWindowPos, WINDOWPOS, WM_MOVE, WM_SIZE, WM_WINDOWPOSCHANGING
file: /Techref/os/win/api/win32/mess/src/msg28_22.htm, 2KB, , updated: 2000/4/7 11:20, local time: 2024/12/24 05:55,
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