Access an XPCOM component through C++ dll

This project is related to creating an Mozilla/Firefox XPCOM components. Tha task is - create a regular C++ dll. In that access XPCOM component. Create an executable(C++ or C#) that loads this dll and calls the functions. This is very similar to what xpcom/sample/program of Mozilla source code does. This one uses an executable to load the XPCOM component, whereas I want to load this XPCOM through a dll.