COM - is it possible to ensure that PART of your default implementation never gets overriden/reimplemented?

[SunnyD]

I'm trying to come up with a sort of plug-in interface, and certain parts need to be implemented by the plug-in author, but there's certain things I want to ensure is always implemented, preferably with my default code. Is there any way to do this? (Windows COM dll, MSVC++)

 

[nickbits]

No.