[AccessD] Capturing the application's Close event

Hola!

I have inherited an Access application (those words alone should
alert you that nothing good is going to follow in this message) that
is exhibiting strange behavior when the user exits by clicking the
Close button on the Access shell.

I'd like to be able to capture and stop the Close process when the
user attempts to exit this way.  I have Googled, but to no avail.

Anyone know how to do this?

-Christopher-