Pl. Help:- Clipboard & keyboard

I want to prevent capturing screen when my applet is running in browser, is it possible to do, if could pl. explain, I have got some clues:

1)We can,t clear or get access to clipbord as it comes inside the "sandbox" ie., local resource (unless we digitaly certify) so Not possible.
2)I checked that except "Print Screen" grey button we can capture all key press and override it except this, pl. tell is there any method to capture this key too.
3)Is it posible to disable the keyboard itself when applet is running, and have only mouse to be working...
So this is my problem pl. help....
Thank you!!.
rajesh


rajesh