I found ComClass, now how do I do it?

I wrote a small COM server in Delphi 2010 that acts as a plugin in a retail application. The trading application looks for a "discover" interface that registers any number of additional interfaces that call TAutoObjectFactory.Create

for each one. This works great - all pluggable interfaces function as designed.

But now I would like to call a public method of one interface from another interface, so I don't need to duplicate code. Seems simple enough, just call ComClassManager.ForEachFactory

looking for the ClassID of the interface I need to use. Got it too!

But now that I have found the class, I am puzzled by the seemingly trivial last step: how to use or distinguish a class (or a class reference?) That I found in order to actually call one of its methods.

In the "FactoryProc" I posted to ForEachFactory

, I am assuming the ComClass property for TComObjectFactory

is what I need, but it is a TClass type, a class reference to the actual class object it is (at least I hope I understand correctly ). I am a bit fuzzy about class references and my attempts to reset or otherwise remove the reference to this property resulted in access violations or compiler errors.

Any suggestions?