This documentation is archived and is not being maintained.

Exporting C++ Functions for Use in C-Language Executables

If you have functions in a DLL written in C++ that you want to access from a C-language module, you should declare these functions with C linkage instead of C++ linkage. Unless otherwise specified, the C++ compiler uses C++ type-safe naming (also known as name decoration) and C++ calling conventions, which can be difficult to call from C.

To specify C linkage, specify extern "C" for your function declarations. For example:

extern "C" __declspec( dllexport ) int MyFunc(long parm1);

What do you want to do?

What do you want to know more about?

See Also

Exporting from a DLL