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Sending keys to a process
Well it depends, there are a few ways
first if it's just one command use the thing Mr_Cheese said.
Else make it run a bat file if you want a series of commands being executed.
If you just want to send random shit you need to get the window handle, you can do it llike this :
markupAppActivate msnmcontact.FriendlyName & " - Conversation"
// code taken from the post of The_Inferno, all credits go to him lol
and then you can always use the win32 api to do it. but that i don't know from the top of my head but it should be easy to look up.
two good sites for looking up: www.google.com www.msdn.com
Cheers ;)