The last piece of code to add to the sample is to handle closing the socket when the program is terminated by selecting Close on the system menu. The best place to put socket cleanup code in the form's Unload event, such as:

Sub Form_Unload (Cancel As Integer)
If Socket1.Connected Then Socket1.Action = SOCKET_CLOSE
End Sub

This should be rather self-explanatory. The only new property that has been introduced is the Connected property, which is a Boolean flag. If it is True, then a connection has been established. With all of the properties and event code needed for the sample client application completed, all that's left to do is run the program!

The first thing that you'll probably notice is that if you specify an incorrect host name or address, an error will be generated and the program will stop. Of course, in a real application you'd need to provide extensive error checking. SocketWrench errors start at 24,000 and correspond to the error codes used by the Windows Sockets library. Most errors will occur when setting the host name, address, service port or Action property.