Hi,
This should do the trick, but it doesn't work in WinXP or Win2k. You could search at MSDN for other parameters which will disable them for these environments, I know there is one which will disable ALT-TAB and CTRL-ESC for sure, but I don't know if you can disable CTRL-ALT-DEL. I guess the best thing to do this is by filtering the Key combination with a system wide hook.
[tt]Private Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, ByVal lpvParam As Any, ByVal fuWinIni As Long) As Long
Private Const SPI_SCREENSAVERRUNNING = 97
Private Sub HideCtrlAltDel(ByVal fBool As Boolean)
Call SystemParametersInfo(SPI_SCREENSAVERRUNNING, IIf(fBool, 1&, 0&), 0&, 0)
End Sub[/tt]
LuCkY