There is a stream_socket_service and a ip::tcp::socket class, with almost the same member functions. I do understand that the first "is_a" service while the second "has_a" service. Is there any rationale beyond just having both? When would I want to use which one? Do I have overlooked something in the documentaion? Any hints appreciated. Roland -- _________________________________________ _ _ | Roland Schwarz aka. speedsnail |_)(_ | sip:speedsnail@ekiga.net | \__) | mailto:roland.schwarz@chello.at ________| http://www.blackspace.at