>I'm trying to adapt a previously-constructed form to use a custom object for some of its functionality. It's been like juggling chainsaws under fire - you've got a 100% chance of injury. Anyway, if any of the custom object's methods get called, the form lodges in memory and won't destroy.

Do you add this object to the form as an object, or store it in a property? Make sure to .NULL. it if its in a property in your Destroy()