GtkTextView - reacting to some key events?

[Franck Stauffer <stauffer franck wanadoo fr>]

Hello,

This is my first post on this and also my first gtk app i'm working on. 
I have a GtkTextView that is used to type in chat messages. I would 
like to "know" when the user presses enter or control+enter while 
typing some text in that view...what's the best way to do this ? (I 
don't want to use GtkEntry since i need it to handle more than one line)

Thank you

Franck