>How can you trigger code to run when the main Foxpro window is minimized?

Try

_Screen.AddObject("oResizer", "Resizer")

DEFINE CLASS Resizer AS Custom
     oScreen = _Screen

     PROCEDURE oScreen.Resize
          IF _screen.WindowState =1
              * Main VFP Window is minimized
          ENDIF
     ENDPROC
ENDDEFINE