Hi, Thanks for very quick reply Claude. Your suggestion resolved the issue. Using extern "C" worked for me. Thank you very much. Thanks to all. Regards, Rajendra

---------- Forwarded message ---------- From: Claude Heiland-Allen Date: Wed, Mar 14, 2012 at 7:43 PM Subject: Re: [Haskell-cafe] Unable to call function from DLL using FFI To: haskell-cafe@haskell.org

On 14/03/12 14:01, rajendra prasad wrote:

...

My c++ code(HelloWorld.cpp) looks like this:

Try adding extern "C" { ... } to use the C ABI instead of a C++ ABI (which usually features symbol name mangling to add type information, among other things). (This may not solve the entire problem, but is an important puzzle-piece).

__declspec(dllexport) int doubleMe(int a)

...

{ return 2*a; }

Claude

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