I think I know the answer to this, but just in case there is a strategy I don't know about...
In the past when I have an object on a form that holds a reference to another form object, I have just set o1.oRef = .NULL. in the form.destroy. This has been fine because this design was happening at the form level.
I am now trying to create a class that has to hold a reference to another object on the form, and I would like for the class to watch out for itself. I quickly found that THIS.oRef = .NULL. in the object's destroy event won't do the trick. Is there another way to make this class self sufficient? IOW, I don't want to have to rely on form code to release the object.