Hi, I would like to log to a standard container like std::list<std::string> or something similar, so i can send my logs to another program over network. But i have problems defining my own destination. For now it would be ok, to log just to a string. But i don't understand how to define my own destination in the right way. I looked at http://torjo.com/log2/doc/html/namespaceboost_1_1logging_1_1manipulator.html... but i don't understand the "sharing data" part well. Maybe someone can help me out here? I have so far: struct to_string : boost::logging::destination::class_<to_string, boost::logging::destination::implement_op_equal::has_context> { std::string s; to_string(std::string s) : s(s) {} bool operator==(const to_string& other) { return s == other.s; } // param = const std::string& // (in other words, it's the arg_type from your destination base class) void operator()(param msg) const { // s.append(msg); } But even that is not compiling. Any help would be appreciated! :-) Greetings Manuel Jung