Hi everyone, Could someone please point me in the right direction with this one? : class data { int x; }; class worker { void run(&data d); }; void run_worker(worker& w, data& d) { boost::thread(boost::bind(&worker::run, &my_worker, _1)(boost:ref(my_data))); } void main() { worker my_worker; data my_data; run_worker(my_worker, my_data); } Compiling this yields.. test.cpp(24) : error C2440: 'type cast' : cannot convert from 'boost::_bi::bind_t::result_type' to 'boost::thread' with [ R=void, F=boost::_mfi::mf1, L=boost::_bi::list2>::B1,boost::_bi::list_av_2>::B2> ] Expressions of type void cannot be converted to other types Can I not bind to functions with a void return type? Changing it to int, produces a similar message. Any help appreciated! Thanks, Mike _________________________________________________________________ FREE pop-up blocking with the new MSN Toolbar – get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/