Delphi dll to improve C ++ project

Question

I have inherited an old C ++ project (MFC) and have to add new features. The new functionality basically does not contradict the existing C ++ code, for example, additional dialogs, etc.
With limited experience with C ++ MFC, I would prefer to make additional functions in Delphi, create a DLL and use the DLL in a C ++ project.

I assume this is generally possible, similar to using the C ++ DLL in Delphi?
Are there restrictions on what can be done this way?

Answer 1

, , Dll . . DLL Delphi MS Visual ++ '

Answer 2

, . .., , MFC VCL, .

Answer 3

Windows COM. COM/ActiveX, , GUI.