Visual C++ (COM objects)

I'm trying to figure it out but i need someone to explain it to me.
What functions i need,structure, just tell me some thing about it!!!
and how to put buttons etc.
Just give example,tell were to put that in program,and what can you change in it etc.

please help

Buttons have nothing to do with COM, and you are asking for help on somehing far too broad.
There is pretty much nothing useful we can do for you without a lot more information.