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From: Jason Hood <jadoxa AT yahoo DOT com DOT au>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: detecting process termination
Date: Thu, 28 Oct 2004 03:07:24 +1000
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Hans-Bernhard Broeker wrote:
> 
> rafael-_no-spam_- AT _-please-_geninfor DOT com wrote:
> > I would like to detect when the user clic on the X button to close the
> > process in which is running my program under Windows.
> 
> > I thought it could be possible using signal() but I see SIGKILL and
> > SIGTERM are "currently unused".
> 
> > żIs there any chance to know the program end is coming?
> 
> Not the one induced by the Windows 'X' button: that one kills your
> virtual DOS machine ("VDM"), i.e. it doesn't even try to talk to your
> running DOS program.  That's why you get a warning dialog if you use
> it ("Windows cannot shut down this program...") in essentially all
> situations but one: when command.com is idling on the command line
> (sometimes it takes a 'cls' for Windows to recognize this state).

Actually, you should be able to use the "close awareness" functions
to recognise the 'X' button. Check out RBIL[1], Int2F/AX=168F. Not sure
if they work on the NT family, but they do work in 9X (I needed them
in CmdEdit to enable COMMAND.COM to close).

[1] Ralf Brown's Interrupt List

Jason.