What if something goes wrong with your app and it needs to be killed?

>Thanks, but in XP if the user is pressing CTRL+ALT+DEL the Windows Securiy screen comes up with the possiblily of killing my application. I am trying to avoid that and to disable the CTRL+ALT+DEL key.
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>Knowing that the user pressed the combination is not helping me since the harm was already done!
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>Vali