Disable CTRL-ALT-DEL

Can anyone here know how to disable the CTRL-ALT-DEL key when I make
program through Delphi !! So that after someone press CTRL-ALT-DEL it
will not works or the program will not appear on the 'close program
dialog box' !! Can anyone tell me !!
my email is david_k...@hotmail.com
please help me !! Thanx