Hiya !
For sending a message to a remote client on a LAN:
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dos command NET SEND {name | * | /DOMAIN[:name] | /USERS} message
Sends messages to other users, computers, or messaging names on the network.
The Messenger service must be running to receive messages.
name Is the username, computername, or messaging name to send the message
to. If the name is a computername that contains blank characters, enclose the
alias in quotation marks (" ").
* Sends the message to all the names in your group.
/DOMAIN[:name] Sends the message to all the names in the workstation
domain. If name is specified, the message is sent to all the names in the
specified domain or workgroup.
/USERS Sends the message to all users connected to the server.
message Is text to be sent as a message
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For viewing clients screen: Logon to
www.vnc.com... download the server and
intsall on the m/c's !! you just need to enter clients name or IP & psswd (if
set while configuring vnc)......
hope this helps !!!!