If I have boost::shared_ptr<some_class>, it's possible to cast it to shared_ptr<void>. But it does not appear to be any way to convert pointer to function to pointer to void -- just because there's no implicit conversion from function pointer to void*. So, when I compile the attached program with g++, I get: sp.cpp:22: instantiated from here /home/ghost/Work/boost/boost/shared_ptr.hpp:163: error: invalid conversion from `void (* const)()' to `void*' Is there any way to make it work? What I'm trying to do is: - access a function from DLL -- i.e. get shared_ptr<function_type> - do something with the function - cast the pointer into shared_ptr<void> The last pointer will be stored in various places to keep the DLL in memory until last object which depend on it is destroyed. I think I can keep shared_ptr<function_type> everywhere, but can shared_ptr<void> work somehow? Thanks, Volodya