In LAN you can either type computer name or ip address, over a WAN type in IP. I dont know about you guys but netsend can be a scary little bugger. ie. on a lan "netsend * HELLO" will send to every comp on the network.
Is there a easier way to do then type in all thoes command line. I saw a option in the "control alt delete" says user and under that, there is a command for send meassage. U guys know how to use that ?