Tries to make a connection with a server. If the server allows a connection, a wx:connection% object will be returned. The type of wx:connection% object returned can be altered by overriding the on-make-connection method to return a object of a derived connection class.
When using TCP/IP, host is a host address and service is a port number. When using Windows DDE, host is ignored and service is a service name.
The topic argument is an arbitrary string thaht is recognized by the server.