NET SEND is hardcoded into XP, it does not require third party software.
The syntax: net send COMPUTERNAME “message”
For example: net send ALPHA “Please restart Outlook. wjs 08.07.09″
To start the messenger service, which is required: Start>Run>services.msc. Find “Messenger” and start it.
Hope this helps!
The Messenger service can also be started from the command prompt with the following command:
net start Messenger
you have to make sure before you use this command that the “messanger” service is working .