Three Easy Methods to Send Message over LAN

To Send message direct over home network at first you must activate the feature in both computers which is always inactive by default.

• Go to Start > Run
• Type services.msc and hit enter
• Search for Messenger at the right side of the opening window.
• Double click on Messenger this will open the properties.
• Select Startup Type to Automatic and click on Apply
• Now click Start. 
• Wait until the service is activated & click on OK.

(Follow the same process to activate Messenger service in other computers also.)
Use any of the methods below to send message over LAN

       Method One

• Open Command Prompt (Go to Start > Run type cmd & hit enter.)
• Now type net send (ip of the computer) message  and hit enter. (view image)

Your message was successfully sent......

       Method Two

Copy and Paste the following lines in Notepad and save as anything.bat

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

Open the anything.bat and type the IP of the pc, hit enter, type message and again hit enter to send. 
     
      Method three

• Download NTMessenger here and run.
• Type the name of the workgroup computer in the To (Or select To all option to send in all computers in that network ) 
• Type message and click on Send button at the left.

Enjoy :P