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The WM_NCMOUSEMOVE message is posted to a window when the cursor is moved within the nonclient area of the window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted.
A window receives this message through its WindowProc function.
LRESULT CALLBACK WindowProc( HWND hwnd, // handle to window UINT uMsg, // WM_NCMOUSEMOVE WPARAM wParam, // hit-test value LPARAM lParam // cursor position );
If an application processes this message, it should return zero.
If it is appropriate to do so, the system sends the WM_SYSCOMMAND message to the window.
You can also use the GET_X_LPARAM and GET_Y_LPARAM macros to extract the values of the x- and y- coordinates from lParam.
Windows NT/2000 or later: Requires Windows NT 3.1 or later. 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