Thanks for the link Stéphane. This expose a weakness in VFP, since in theory, it should clean up after itself. Requiring the client to call Release () break encapsulation.

I wonder if VFP 8 solve this problem.

>Not quite!, VFP does have some garbage collection be it can't do everything. you must be extremly carefull at cleaning up when building COM servers.
>
>Take a look at http://fox.wikis.com/wc.dll?Wiki~ManualGarbageCollection~VFP