Does anyone know if the 'Window' object has any events associated with it?

I'd like the ability to have multiple windows open using:

DEFINE WINDOW lwWin1 FROM X,X TO Y,Y NAME oWindow1
DEFINE WINDOW lwWin2 FROM X,X TO Y,Y NAME oWindow2
MODI FILE foo1 WINDOW lwWin1
MODI FILE foo2 WINDOW lwWin2

Then I'd like to know when each one of these windows is closed.

Thanks for any help!

-Matt