WM_NCMOUSEMOVE

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.

WM_NCMOUSEMOVE 
nHittest = (INT) wParam;    // hit-test value 
pts = MAKEPOINTS(lParam);   // position of cursor 
 

Parameters

nHittest

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.

pts

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.

Remarks

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.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in winuser.h.

See Also

Mouse Input Overview, Mouse Input Messages, DefWindowProc, MAKEPOINTS, POINTS, WM_NCHITTEST, WM_SYSCOMMAND