Block Ctrl-Alt-Delete in Windows 2000, Windows XP and Windows Vista... (who said that it could not be done?) KeyTrap is a programmer's tool for Microsoft Windows that allows you to trap key presses and optionally block them. KeyTrap offers a rigorous key trapping solution for all (Win32) versions of Microsoft Windows and for all keys. KeyTrap wedges itself between the keyboard hardware and the Windows operating system and blocks keys before Windows is even aware of them. KeyTrap is not just for trapping Ctrl-Alt-Delete; it can also trap any other key combinations, like Alt-Tab, or the Windows keys. KeyTrap maintains the keyboard state and a key queue internally, so blocked keys can still be detected by your program.

• dWinlock 1.
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• JumpKeys Pro 1.21
  A multi-function utility for programmers and power users