Closing DOS Windows

[Brent Boshart]

Can a DOS program respond to the user closing the window its running in? I want to shut down my dos program properly if the users tries to close the window.

[Eric Pearson]

A plain DOS program? Nope. If you were talking about a 32-bit console app, such as those produced by the PB/CC compiler, then yes it can definitely be done. And it may be possible (I don't know) using the PBDK system to "enhance" a DOS app with certain Windows capabilities. But I'm not aware of anything that would allow a standard DOS app to do that.

-- Eric

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Perfect Sync: Perfect Sync Development Tools
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[Sebastian Groeneveld]

Ok, then how about the following: I would like to let my program run in a DOS box. At the end of the program, it would wait for the user to press a key (or click on a [close] button) after which I want to end my program and close the DOS window.

I know the user can choose to "pause after termination", but is there some sort of interrupt which will close the DOS window?

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Sebastian Groeneveld
mailto:[email protected][email protected]</A>

[Denny Moore]

Windows can do the close for you. Set up a desktop shortcut
for your program. Right click on the shortcut. Click
"Properties". Then, click on "Program" tab. Click the
"Close on Exit" square. Click "Apply", click "Ok"

When your program terminates, under program control, the window
will close. You will not have to type "exit".

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[Matthias Hoffmann]

Yes indeed you can replay to a window close request:
use INT &h2F, Subfunction &h168F (see Ralph Brown's
Interrupt list for further documentation1). First you must
tell windows that you want to be informed of a window
close request ("Close awareness"), then you must call
the subfunction "Query_Close" repeatedly in your keyboard-loop. if the user klicks the windows-Close button, the Query_Close call will notify you. If you are interested, I can mail you an complete example, but it's not easy to understand because it's embedded in an multipurpose screen and keyboard i/o-unit. P.S.: running an PB/CC-Program, it IS NOT POSSIBLE to respond to window-close-requests. As far as I know, it is only possible for real-Mode MSDOS-Programs. Additionally, I don't know if the int &h2f-Methods works with Win/NT, because the NT-MSDOS-Interface is very, hm, uncomplete.

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[Lance Edmonds]

Hi Mattias,

I'm interested in the code too... can you please email it to me at mailto:[email protected][email protected]</A>

Thanks in advance.


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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Eric Pearson]

I'd be very interested too! I had no idea that that was possible.

-- Eric

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Perfect Sync: Perfect Sync Development Tools
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