asio bind

void Write(const boost::system::error_code& error, std::size_t bytes_transferred)
{
    if (!error)
    {
        std::cout << "send byte=" << bytes_transferred << std::endl;
    }
}

void connect_handler(boost::asio::ip::tcp::socket& socket,const boost::system::error_code& error)
{
    if (!error)
    {
        std::cout << "yes" << std::endl;

        char szData[29] = { "this is a test" };
        socket.async_send(boost::asio::buffer(szData), boost::bind(Write,_1,_2));
        //socket.send(boost::asio::buffer(szData));
    }
    else
    {
        std::cout << error.message().c_str();
    }
}

int main()
{
    boost::asio::io_service Service;
    boost::asio::ip::tcp::endpoint endPoint(boost::asio::ip::address::from_string("127.0.0.1"), 5050 );
    boost::asio::ip::tcp::socket Socket(Service);

    //Socket.async_connect(endPoint, [&]() {connect_handler(Socket,0); });
    Socket.async_connect(endPoint, boost::bind(connect_handler, std::ref(Socket),_1));
    //Socket.async_connect(endPoint, boost::bind(connect_handler, std::ref(Socket), boost::asio::placeholders::error));

    Service.run();

    system("pause");

}