From:	Kevin Hise <NOkevinhSPAM AT ridgecrest DOT ca DOT us>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Windows trashes my 800x600 graphics mode program.
Date:	Mon, 03 May 1999 09:55:27 -0700
Organization:	Cyplex, Inc.
Lines:	28
Message-ID:	<372DD4FF.F4C73D1@ridgecrest.ca.us>
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 990429102909 DOT 6487P-100000 AT is>
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To:	djgpp AT delorie DOT com
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Are you referring to this code snipet?

> > .................................................................
> > Interrupt 2Fh Function 4001h
> >
> > mov ax, 4001h   ; Notify Background Switch
> > int 2fh

...this isn't a hook, it's a call.  I didn't see any other code posted
to this thread.

Regards,
Kevin.




Eli Zaretskii wrote:
> 
> On Wed, 28 Apr 1999, Kevin Hise wrote:
> 
> > is this a interrupt that I hook/monitor in my
> > code to detect when Windows has switched me into the background?
> 
> Yes.
> 
> A working code was posted in this thread; you can use it to fill in
> the blanks.

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