Help about ActiveX object parameter

I am doing make a ActiveX control. In this control I can reference other ActiveX object. That is to say how to let other ActiveX object as a property and it can call other ActiveX object methods and properties. In VB6.0, it is a very easy problem,who can tell me how to deal with in VC6.0? I appreciate your help. Thanks in advance.

Please we can improve our program ability together.