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Accessing CStrings in DLLs from VP5
Message
 
 
À
08/04/1998 23:53:08
Information générale
Forum:
Visual FoxPro
Catégorie:
Fonctions Windows API
Divers
Thread ID:
00090588
Message ID:
00090714
Vues:
29
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.
df (was a 10 time MVP)

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