David,

What do you do about a class that's not a container class, and doesn't have an addobject method? I ran into a similar problem a while back - I created a sizing object which automatically handles resizing of any object which has a reference to it when it or it's container is resized. In order to do it, I had to pass the "parent" class' object reference to the resize object. To solve the dangling reference problem, I use the same name for this object in all my classes, and in all my base container classes, I created a "custom event" which triggers all the cotained classes to kill the autoresize object reference.

Sounds complicated, and it was, but now that it works in all my baseclasses, I never have to worry about it. Is there a better way to do that?