>I know how to use the form moved event, but how do you detect if the user moved the application window, the _screen object? I want to capture the _screen.top and _screen.left when the application is moved when it is not in full screen mode. How can I capture these variable after the _screen is moved?

You can use BINDEVENT(). Here's a sample code

PUBLIC oHandler
oHandler = NEWOBJECT("ScreenMovedHAndler")

BINDEVENT(_SCREEN, "Moved", oHandler, "Moved")

DEFINE CLASS ScreenMovedHandler AS Session
   PROCEDURE Moved
       ? _SCREEN.Top, _SCREEN.Left
   ENDPROC

ENDDEFINE