How to get keyboard input

[Ray Crampton <RayCrampton worldnet att net>]

I have a non-editable text box in which I want to echo keystrokes and
then send the keystrokes for processing elsewhere as well.

How do I retrieve keystrokes as they come in?

I see key_press_event, and I've made a callback based on it which gets 
called each time a key is pressed, but I can't figure out how to get
the value of the key.

Thanks for any help,

Ray