HELP!!!! I'm trying to compile an application which contains boost threads and I can't seem to get it to work. Whenever I try to compile, I get the following two types of messages from the compiler: warning C4275: non dll-interface class 'std::logic_error' used as base for dll-interface class 'boost::lock_error' or warning C4251: 'boost::thread_group::m_threads' : class 'std::list<_Ty>' needs to have dll-interface to be used by clients of class 'boost::thread_group' Obviously, these have something to do with the mixing of DLL and non-DLL classes, but since Windows is not my preferred OS I have no clue about what to do to get this to compile. I used boost (v 1.28) on a prior project (using VC6) with no problems, but I'm just stumped here.... Can anyone give me a clue? Thanx, Steve