>I want to create a chat on VFP in my LAN. LAN consist of two computers. How can I make it without using temporary tables, etc ? I want to connect two PC directly by TCP/IP ...
Look into MSMQ. There's a whitepaper by Robert Green covering it extensively.
It's a complete waste of time - if you have a TCP/IP link, you can use the internal Windows WinPopUp messaging and avoid this entirely.