>Vlad,
>
>>If it uses CStrings, than it's C++...
>
>Yes CString is the MFC string class.
>
>>I don't believe that a function that returns a CString can be exported as C standard.
>
>I've never written a C++ DLL routine that returns a string. Most of the time I pass a string reference to the DLL, so I can let VFP preallocate the buffer, but I'd guess that it isn't really a problem if you just assign a CString return value into the VPF memvar, I might just have to test this later.
>
>But I know that my VFP Ole server returns a VFP string and the C++ code recieves it as a CString. VC++ seems pretty good at casting CStrings in and out.

I found your "Spy-In" VFP/C++ app useful as a learning tool for incorporating C++ DLL's in my own projects. Although I am not very proficient in C at this point, I would like to learn more about it to provide compiled modules in future apps.

How do you come to a decision to develop a DLL as opposed to a pure VFP solution? If I am looking at developing C++ classes to handle math intensive routines, could I actually be making things more complicated than I have to? The type of routines would handle premium and claims processing in the area of medical/dental insurance...

Any advice would be greatyly appreciated...

Thanks,
Jack Mendenhall
Reinsurance Management, Inc.