C++Guru: Virtual Function call

We are looking for following solution. We do not know if this is possible: In our software we have an Function "Open". This is an Function, very long, that call an DLL and fill the software GUI with informations. Actual the function is inside our software, let say inside CDialogDlg.cpp. Now, we wish to add this function inside an small Exe or DLL. If an function inside our software will call this "Open" Function, the software will extract the function from the DLL or Exe or call inside, but works with it as an own function. So it will use this function as an virtual or inline function. For any suggestion we are open. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform MS C++ 2003, Windows