Path: utzoo!attcan!uunet!lll-winken!ncis.llnl.gov!helios.ee.lbl.gov!ucsd!nprdc!snguyen
From: snguyen@nprdc.arpa (Son Nguyen)
Newsgroups: comp.sys.ibm.pc
Subject: CTRL-ALT-DEL key
Message-ID: <1623@arctic.nprdc.arpa>
Date: 17 Mar 89 20:13:47 GMT
Sender: news@nprdc.arpa
Reply-To: snguyen@nprdc.arpa (Son Nguyen)
Organization: Navy Personnel R&D Center, San Diego
Lines: 25


Hello, every one.

	I just wonder if (possibly done) we could write a program to
detect the pressing of these three keys: CTRL-ALT-DEL.   In other words,
can I write a software in the "C" language or in IBM assembly language to
detect and maybe disable them  ?   You may say that I am a little crazy.
The reason I would like to achieve so is because I would like to implement
a password program hat allows only the authorized users to access my IBM
PC XT computer.  I know how to disable the interrupts but my friends are
smarter.  When they turn on my computer and notice that I have installed
this program, they then press the keys CTRL-ALT-KEY and insert their own
MS-DOS disk on the drive A:.  It may seem silly that why they don't put
their system disk initially when they try o turn it on.  Well,  that is
another problem.  This raises my second question:  Can we configure the
computer to boot only with "C:" drive ?	

	Thanks a million every one.

						Son Nguyen


PS:  Please, don't tell me to buy an IBM AT which
has the key lock.  My questions are posted to achiee both
points: for learning, and for my IBM PC  protection.