Need help programming a Audio Unit that wraps a 3rd party audio unit

Hi, firstly, I could not find any other forum on the Internet to discuss mac programming. And I can't connect to the apple developer forum.

I am trying to develop an Audio Unit instrument using Xcode. I want my AU to load an instance of a 3rd party Audio Unit called Massive by Native Instruments. I want all MIDI notes passed to my AU to go into the Massive AU and the output of that is the output of my AU.

I just want my AU to programmatically control some variables of the 3rd party one and pass through all sound/MIDI to it too.

I can't seem to find any examples of how to do this. Also, I am a newbie with Core Audio and the documentation is very hard to understand. I don't really know what I'm doing with Core Audio...

Can someone please tell me how to do this?

Thanks.

edit: I am using C++