I'm trying to write a little wrapper round Windows GetProcAddress (dlsym equivalent?) that takes a function name by string, loads it dynamically and returns it as a boost::function. I'm having trouble getting my code to accept the same type of signatures as boost::function. E.g.: template<typename Signature> boost::function<Signature> proc_address( hmodule hmod, const std::string& name) { return boost::function<Signature>(GetProcAddress(hmod, name.c_str()); } Where GetProcAddress returns a int (*)() which you cast to the function signature you're expecting. The problem is that when I call: boost::function func; func = proc_address(hmod, "GetKeyboardInfo"); The compiler (MSVC 2005) complains about a ) after the int: error C2144: syntax error : 'int' should be preceded by ')' error C2563: mismatch in formal parameter list Am I trying to reuse boost::function the wrong way? I also tried making a functor instead but I have no idea what to put as the parameter list for operator(): template<typename Signature> class dynamic_function { public: dynamic_function(hmodule hmod, const std::string& name) : m_func(GetProcAddress(hmod, name.c_str())) {} operator()(...what goes here?...) { return m_func( ... what ... ); } private: boost::function<Signature> m_func; }; Any help is greatly appreciated. Alex