Messenger without a software..

If you want a private chat with a friend or client on you Network, you don't need to download any fancy program!
All you need is your friends IP address and Command Prompt.

Firstly, open Notepad and enter:

@echo off
:A
Cls
echo MESSENGER
set /p n=User:
set /p m=Message:
net send %n% %m%
Pause
Goto A

Now save this as "Messenger.bat". Open the .bat file and in Command Prompt you should see:

MESSENGER
User:

After "User" type the IP address of the computer you want to contact.
After this, you should see this:

Message:

Now type in the message you wish to send.
Before you press "Enter" it should look like this:
eg:
MESSENGER
User: 56.108.104.107
Message: Hi

Now all you need to do is press "Enter", and start chatting!