Implementing DTM in .net using existing MFC DLL

Hello...

We are trying to design a DTM tool kit in which the existing Biz logic is in form of MFC dll. The tool kit design is in .net. The generated appplication in .net should inherit (and not just use) all the template code of MFC dll and generate new application.
I have found no way in which I can inherit MFC and generate a new class in .net, so I would like to know is there any solution or do I need to go back to MFC and redesign my application?

Thanks and regards,

manisha