Date:	Thu, 23 Apr 98 12:25:39 PST
From:	"altaf.aali" <altaf DOT aali AT cressoft-khi DOT com DOT pk>
Message-Id:	<9803238933.AA893359537@cressoft.comsats.net.pk>
To:	djgpp AT delorie DOT com, a DOT hofkamp AT wtb DOT tue DOT nl
Subject:	Re: Interfacing to a MS-Windows application: How ?

     

There is a libwin for DJGPP which may provide a solution to your problem. The 
link to it is at the following page (SET's DJGPP programming links)

http://www.geocities.com/SiliconValley/Vista/6552/dlinks.html
______________________________ Reply Separator _________________________________
Subject: Interfacing to a MS-Windows application: How ?
Author:  a DOT hofkamp AT wtb DOT tue DOT nl at comsats
Date:    4/22/98 7:16 PM


Hello all,
     
I'd like to interface my DJGPP program with a MS-Windows app. In 
particular, the DJGPP app should be called from Excel or VB (with some 
data transferred to the DJGPP program preferably, but I don't mind if 
that has to be transferred using a file), run for some time (possibly 
several hours), and then "return" to the MS-app. During the return, data 
also has to be transferred, but this is potentionally a lot (several 
MB's), so transfer using a file is not a problem.
     
The big question here is how can this be done.
     
I am pretty good at C++, but am an absolute newbie regarding the 
programming techniques in MS-Windows, and the 32-bit DPMI interfacing 
techniques.
     
In other words, I have no idea how to approach this problem regarding 
the MS-Windows interfacing. I know that a mechanism called DDE exists, 
but I don't know how to use it in Windows or in DJGPP.
     
I am willing to accept any solution, including the reversal of roles 
(DJGPP calls the MS-App to provide data, then performs calculations, 
then calls again to let the App handle the results).
Also the change from a DOS-box DJGPP app to a "native" window app is not 
impossible, if that works (but I don't know how to do that either, so 
pointers regarding that process are also welcome).
     
If you have pointers to documentation, or web-sites, or actual code, 
please let me know.
     
Albert
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