how to send a private message from pc to pc on a network?

Answer 1

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:

MESSENGER
User: 56.108.104.107
Message: Hi

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

You have to have messenger enabled on both computers.
To do this go to Start>run>services.msc>messenger>Start The Service

Answer 2

Use Net Send:

net send [PC Name] [Message]

Be aware that Windows XP SP2 automatically disables the messaging service.

Answer 3

through netsend command

Answer 4

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/net_send.mspx?mfr=true