Thanks, it compiles now and works but I do get several warnings (also with the test programs), see below. Just a question. Is it possible to have the singleton automaticly created at program start? (A global variable isn't an option since that is what I'm trying to avoid in the first place) Here are the warnings (they are repeated several times) boost\singleton\leaky_lifetime.hpp(207) : warning C4512: 'boost::singleton::leaky_lifetime_ex<CreationPolicy,Creator,Lock>::lifet ime<Type>::auto_set<T>' : assignment operator could not be generated boost\singleton\creators.hpp(174) : warning C4511: 'boost::singleton::create_using_new_ex<NoThrow>::creator<Type>::creatabl e<Base>' : copy constructor could not be generated boost\singleton\creators.hpp(181) : warning C4127: conditional expression is constant boost\singleton\leaky_lifetime.hpp(77) : warning C4127: conditional expression is constant