Hi,

I have modified the sample program provided in the asio samples, just to accept a connection like this

void TCPServer::StartAccept()
{
    try
    {
        TCPConnection::Pointer NewConnection=TCPConnection::Create(Acceptor.io_service());
        Acceptor.async_accept(NewConnection->socket(),boost::bind(&TCPServer::HandleAccept,this, NewConnection,boost::asio::placeholders::error));
    }
    catch(std::exception& e)
    {
       cout<<"exception"<<endl;
    }
}

Another program is already listening on the port "13" (A service version of the same program). When this new program tries to listen (async_accept) on port "13", no exception is thrown!.

How can I check weather the port is already open?

Thanks,
Lloyd