Linking code to MFC menu or Alternative?

Hi!
I need help in adding my source code to a MFC UI front end. I have a huge source code
of a scientific problem in C++. The source code includes a main.c. I want to run this
application or link this applicaiton to an MFC UI. Can anybody suggest me how to do
it?

Thanks.
Murali

Murali.K
Coastal Researcher.