DllImport question

[Rookie]

Hi,

I was trying to link a UI I made in C# to the backend which is coded
as a DLL in VC++.

I used the DllImport attribute to invoke the dll functions. Is there
any similar mechanisms by which I can invoke member functions of
classes defined in the dll?

Is there any way I could instantiate an object of a class defined in
the dll?

I am new to C#/dll's et al so I am not too sure if these questions
make sense. But if anyone can provide some info on this and more
importantly provide pointers to articles/examples on these topics it
would be a tremendous help.

Thanks.

[Klaus H. Probst]

Only if you expose the classes as managed objects. In VC++ 7.x you can do
this, but beyond simple calling of exports in DLLs C# will not talk to
anything that is not a managed library. That means you'd have to put a
wrapper around your C++ classes.

It's the same approach as COM, basically. VB6 could not talk to C++ classes
unless they were exposed somehow through COM.

--
Klaus H. Probst, MVP
http://www.vbbox.com/
"Rookie" <do***********@rediffmail.com> wrote in message
news:cf**************************@posting.google.c om...

Hi,

I was trying to link a UI I made in C# to the backend which is coded
as a DLL in VC++.

I used the DllImport attribute to invoke the dll functions. Is there
any similar mechanisms by which I can invoke member functions of
classes defined in the dll?

Is there any way I could instantiate an object of a class defined in
the dll?

I am new to C#/dll's et al so I am not too sure if these questions
make sense. But if anyone can provide some info on this and more
importantly provide pointers to articles/examples on these topics it
would be a tremendous help.

Thanks.