Hi Timothy et al,
I would say that trying to lock the computer programmatically like this, without using OS specific means is generally a bad idea. As long as your users can outsmart you in at least one way.

Timothy Johnson wrote:
Hmm.  Can they do Ctrl+Alt+ESC, or Win+D?
or alt+esc for that matter. Access to the taskkill program in XP or setting focus to task manager by windows+r, taskmgr would be fatal, too. Or a user simply bringing their own task manager with them on removable media, and written in PErl for good measure.

--
With kind regards Veli-Pekka Tätilä ([EMAIL PROTECTED])
Accessibility, game music, synthesizers and programming:
http://www.student.oulu.fi/~vtatila/
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