From:	Robert Hoehne <Robert DOT Hoehne AT Mathematik DOT tu-chemnitz DOT de>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: [Q] mouse under DJGPP
Date:	Fri, 20 Dec 1996 12:36:34 +0100
Organization:	TU Chemnitz-Zwickau
Lines:	35
Message-ID:	<32BA7A42.24E2@Mathematik.tu-chemnitz.de>
References:	<01bbee00$9e9eab70$65216dc2 AT parkview>
NNTP-Posting-Host:	daemon.hrz.tu-chemnitz.de
Mime-Version:	1.0
To:	Yeep <Yeep AT xs4all DOT nl>
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Yeep wrote:
> 
> I want to use the mouse in a program.
> So I would use Int 33h.
> But this is a real mode interrupt and if I use it with __dpmi_int__ it
> would make my program *very* slow (at least accoring to various FAQ's).
At first I cannot say, that accessing the mouse via int 0x33 makes your
program very slow at least for a program, which uses the mouse for the
normal
use in a text system. May be it makes your program slow if you need the
mouse for a game or something like that, but I don't know because never
tried.

I you need every event from the mouse, when it occours, you should
install
your own mouse-handler and give the address of that function to the
mouse
driver with the "install user handler" function.
WARNING: For doing the above you should read carefully all the docs and
FAQ's about writing code, which can be called from real mode interrupts.
That's not quiet simple (You have to look ALL the code AND DATA which
can be modified or accessed by your handler).

If you want to see how I did it, get the sources of RHIDE and look in
the files 'tevent.cc' and 'thwmouse.cc' in the directory
'contrib/rhide-1.0/src/tvision/classes/t'.

Robert
-- 
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* Robert Hoehne, Fakultaet fuer Mathematik, TU-Chemnitz-Zwickau *
* Post:    Am Berg 3, D-09573 Dittmannsdorf                     *
* e-Mail:  Robert DOT Hoehne AT Mathematik DOT TU-Chemnitz DOT DE              *
* WWW:     http://www.tu-chemnitz.de/~rho                       *
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