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Try to declare function with standard calling convention, like
extern "C" _declspec (dllexport) WINAPI int AddNums (int a, int b)

Hi,
i mean you can move dlls in the other folder, but make sure, that path variable contains target directory. In program code I mean it's no possible, because windows uses fixed searching way.
PePi

Hi,
the function must return value LRESULT:

afx_msg LRESULT OnNewPacket(WPARAM wParam, LPARAM lParam);

and the similar changes in cpp file.

PePi