Shoutbox

Hey can someone help me out here, I'm trying to read keys outside of chatwindows to do a certain event. I saw a key input for inside chat windows, but what i'm basically trying to achieve is something like this:

read event for  ctrl + o (pressed anytime)
then Messenger.OpenChat("someone@hotmail.com");

could someone give me a rough example or small template on how this can be achieved??

Thanks