From: Damian Yerrick <MYNAMEISd_yerrick AT hotmail DOT comNO2CANNEDHAM>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Untrapping Ctrl-C in DJGPP
Organization: Pin Eight Software  http://pineight.8m.com/
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NNTP-Posting-Date: Sat, 12 Feb 2000 03:36:10 GMT
Distribution: world
Date: Sat, 12 Feb 2000 03:36:10 GMT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

On Fri, 11 Feb 2000 22:36:55 +0200, Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
wrote:

>Damian Yerrick wrote:
>> 
>> What signal does clicking a Win9x DOS box's close box generate?
>
>None.  Windows closes the DOS box by killing the VM in which that DOS box
>runs.
>
>If the VM still runs a DOS programs, Windows sets the current PSP to that
>program's PSP and then calls function 4Ch of Int 21h, in effect forcing the
>program to exit to DOS.
>
>In any case, no signal is delivered to the program.  In fact, neither DOS nor
>Windows have signals as part of their operation, it's something created and
>handled entirely by the applications' run-time support.  (This is unlike on
>Unix, where signals are generated by the OS.)

So how does edit.com catch it?

(open dos box)
edit foo.c
(type some garbage)
(click close box)
Save changes to foo.c?

-- 
Damian Yerrick  http://yerricde.tripod.com/
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