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The WM_USERCHANGED message is sent to all windows after the user has logged on or off. When the user logs on or off, the system updates the user-specific settings. The system sends this message immediately after updating the settings.
A window receives this message through its WindowProc function.
LRESULT CALLBACK WindowProc( HWND hwnd, // handle to window UINT uMsg, // WM_USERCHANGED WPARAM wParam, // not used LPARAM lParam // not used );
This message has no parameters.
An application should return zero if it processes this message.
Windows NT/2000 or later: Unsupported . Windows 95/98/Me: Requires Windows 95 or later. Header: Declared in Winuser.h; include Windows.h.
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Notebook exported on Monday, 7 July 2008, 18:56:50 PM Eastern Daylight Time