>I'm using tcpServer and tcpClient classes in a VFP9 service that communicates over ports. I have another VFP8 application that has a complicated form written using @...SAY and @...GET. I need to be able to also use the same classes in this code if possible. Can this be done?

What is connection between tcpClient classes and form? You can use VFP9 classes in VFP8 as long as you don't use any VFP9 new features/properties/methods in the class.