Windows XP includes a nifty little program called Winchat. By default, it does not appear on the All Program menu so many of you may not even know it exists. What it lets you to do is carry on a real time chat conversation with other users on your network. It can be a quick and easy way to communicate with someone else on a network (along the same lines as MSN messenger).
To open the program, locate the Winchat application in the Windows\System32 directory or open the Run command and type in Winchat. The Chat interface will open. Click the Dial button to call another user’s computer. Type in the name of the computer you want to chat with or select a computer from the list. Once the remote user agrees to connect with your computer, you can begin your chat session.