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WM_NCMOUSEMOVE Overview  Group

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.


nHittest = (INT) wParam;    // hit-test value 

pts = MAKEPOINTS(lParam);   // position of cursor 



Value of wParam. Specifies the hit-test value returned by the DefWindowProc function as a result of processing the WM_NCHITTEST message. For a list of hit-test values, see WM_NCHITTEST.
Value of lParam. Specifies a POINTS structure that contains the x- and y-coordinates of the cursor. The coordinates are relative to the upper-left corner of the screen.

Return Values

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.

An application can use the MAKEPOINTS macro to convert the lParam parameter to a POINTS structure.

See Also


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