>>"I have put object member variable destruction code in my destroy() events, but this isn't getting executed"

As Glad explained, the form's destroy (event) does not get executed because there is a live reference to it... inside an object which is in turn keeped alive by the form itself.

Doug Hennig presented an excelent "pattern" of programing to avoid these errors in an article he published on FoxTalk some time ago (98?): "Reusable Tools: Kill objects dead!"

If you are a FoxTalk online suscriber you can read it here

HTH
Jose.