Create your own messenger.

If you wanna create your personal messenger than we have a beautiful trick for it. Just copy+paste the following code in notepad and save it as MESSENGER.bat and that's it. now close the notepad window and double click on the file and enter the IP address of the desired person whom you wanna chat than press enter and than type your message. So easy

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