Send Pop-up on LAN

Hello everybody,

First of all, sorry if i don't post on the right place.

I try the demo of  "Dameware mini remote control" for my company and now i will buy it.

I have a question, is it possible to send Pop-Up message to all users of my LAN? For example : "Hello everybody, please close our application and wait 15 minutes".

I don't want to chat or send mail but send a LAN Message. Before it was "net send" on command dos but now it's impossible.

Thank you

PS : Sorry for my english, i'm belgian