COM question

Hi Folks,

I need to receive the entry point from a function in "jscript.dll". Actually, it's not a real
exported function, but let me explain it (I'm not really expirienced with COM).

Some applications are calling IActiveScriptParse::ParseScriptText, but as I already mentioned
above, this "function", is not exported, so I guess I can forget about using GetProcAddress() at any point, right?

The real deal is, I need to trampoline the ParseScriptText call from applications (no it's not malicous), but unless other API calls I can't receive an entry point to insert a jmp instruction.
To complicate things, I'm doing C only, I guess C++ is a better choice dealing with COM.
Actually I just need to know how to call a COM function/method/object with pure win32 API.

Maybe I'm total confused and on the wrong way, is it actually possible to hook COM methods
like |entry point|...|jmp|...|ret ?

Any ideas?