rol or window whenever the user performs the 
action associated with displaying a context menu.  In order to pick up the message you simply subclass the
appropriate window. You can determine where the user clicked by parsing the <i>lParam</i> parameter of the
message, which contains the x position of the mouse in the low word and the y position in the high word.
If you want the window or control to show the default context menu, then you just call the old window 
procedure with the same parameters as the me