使用ActiveX控件自动化VB6应用程序

I have a VB6 application that I don't have source code. This application uses third-party ActiveX controls. I want to automate these ActiveX controls. Is it possible to get the IUnknowns or Object references? For some of these, I can get the underlying HWNDs, but from what I can tell there isn't a generic way to convert these HWNDs to the ActiveX control.I have a VB6 application that I don't have sour