Hmmm, there must be more to this than meets the eye. (pun intended )
When I try to run this on my Win98SE machine, it successfully takes the focus away from my real keyboard, but never shows one on-screen. At that point, I have to hit thr "reset" button on the computer itself to get out. I can't even use CTRL+ALT+DEL, because, obviously, the keyboard is turned off.