HydraExpress generates a client proxy class, <binding>Proxy, which contains the service operation methods, and a sample client implementation, <port>Client. The implementation obtains an instance of the proxy by calling one of several make() convenience functions in the proxy class. The make() methods handle the details of obtaining a rwsf::Transport instance of the correct type for communicating with the server. The transports in HydraExpress are message handlers, derived from rwsf::MessageHandler.