Message-Id: <1.5.4.32.19971106130251.006c5244@dce03.ipt.br>
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Date: Thu, 06 Nov 1997 11:02:51 -0200
To: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>, "N. D. Culver" <ndc AT alum DOT mit DOT edu>
From: Cesar Scarpini Rabak <csrabak AT dce03 DOT ipt DOT br>
Subject: Re: WIN95 and Alt Esc or Ctl Esc
Cc: djgpp AT delorie DOT com
Precedence: bulk

At 12:38 06/11/97 +0200, Eli Zaretskii wrote:
>
>On Wed, 5 Nov 1997, N. D. Culver wrote:
>
>> Is it possible to detect when the user types Alt Esc or Ctl Esc
>> when running DJGPP in Dos Box full screen mode under WIN 95/NT?
>
>Your description implies that you want something different: you want
>to know, from within a running program, whether it was minimized and
>then maximized again.  The keys that were used for that are NOT what
>you are after.  Is that correct?
>
>If it is, then I don't think Windows has an easily-used service for
>that.  You might try two related services that I found by quickly
>searching Ralf Brown's Interrupt List (see below).
>
[snipped]

>--------W-2F1684BX7FE0-----------------------
>INT 2F - MS Windows - VSWITCHD - GET API ENTRY POINT
>	AX = 1684h
>	BX = 7FE0h (virtual device ID for VSWITCHD device) (see #2329)
>	ES:DI = 0000h:0000h
>Return: ES:DI -> VxD API entry point (see #2402)
>		  0000h:0000h if the VxD does not support an API
>
>(Table 2402)
>Call VSWITCHD entry point with:
>	AX = function
>	    0000h toggle windowed mode (simulate Alt-Enter keypress)
>		Return: nothing
>	    0001h get windowed mode
>		Return: CF clear if VM is windowed
>			CF set if VM is full-screen
>SeeAlso: #2399,#2403
>

FWIW I've tested the method using the API below and it works like a charm!

OTOH, I did not figure out how to use the APIs mentioned above, but if any
of you folks would like to share experiences with me, pls e-mail me personally.

>--------W-2F168B-----------------------------
>INT 2F - MS Windows 3.1 - SET FOCUS TO SPECIFIED VIRTUAL MACHINE
>	AX = 168Bh
>	BX = virtual machine ID (see AX=1683h), 0000h for current DOS box
>Return: AL = 00h if focus set to specified VM
>Notes:	documented on the Microsoft Developer's Network CD-ROM
>	if the VM is a windowed DOS box, it will be set to full screen
>SeeAlso: AX=1683h
>--------W-2F168C-----------------------------
>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cesar Scarpini Rabak                      E-mail: csrabak AT ipt DOT br
DME/ASC                                   Phone: 55-11-268-3522 Ext.350
IPT - Instituto de Pesquisas Tecnologicas Fax:   55-11-268-5996
Av. Prof. Almeida Prado, 532.  Sao Paulo - SP 05508-901 BRAZIL
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