how to export functions by name for ctype

Nick Craig-Wood nick at
Mon Jun 23 11:32:05 CEST 2008

rych <rychphd at> wrote:
>  I'm on Windows with VS2005 testing ctypes on a very simple dll
>  I create a test.dll project which exports a function fntest(). I don't
>  touch anything in the autogenerated source and build it. I can load
>  the dll but can't access the function by its name fntest. Only by
>  ordinal number or calling getattr with "?fntest@@YAHXZ". How do I
>  export functions by name? It's probably rather a VS2005 question, but
>  I'm a bit disappointed ctypes doesn't work with a default export
>  convention.

I guess you've compiled your DLL with C++ and the above is a C++
mangled name.

Either compile it with C, or export the names in an extern "C" { }

Nick Craig-Wood <nick at> --

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