To continuously keep variable updated with the mouse coordinates, you can use a combination of the On Timer form event and the GET MOUSE command. A following example will set the timer to update the mouse position every 1/4th of a second.

Case of

   : (Form event=On Load )

      ` these two variables will hold mouse button coordinates
   C_LONGINT(mouseXcoord, mouseYcoord)

      ` sets the timer to fire every second
   SET TIMER(15)

   : (Form event=On Timer )

   C_LONGINT($mouseButton)

      ` get mouse coordinates
   GET MOUSE(mouseXcoord, mouseYcoord,$mouseButton)

End case