How Can I Locked The Keyboard?

I think the safest thing for you to do is to walk around to the back of your machine. See that purple connector? Pull it out. Keyboard is now locked, and a bigger problem has also been solved. Regards KevinT

Create a form, or a control on a form that can take focus and handle KeyPress events. You just eat all the key presses, and do not let focus be taken away. This will almost do the trick. You still have the old three finger salute that you can't do much about. Unless you want to drop into the netherworld and write some good ol' assembler code to take over the keyboard interupt and eat them there. The Crtl-Alt-Del is a nonmaskable interrupt so it is a little more complicated. Please don't do this!

Jeesh, your users are gonna love you...