Date: Mon, 24 Nov 1997 13:26:36 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: Ashod <ashod AT ozemail DOT com DOT au>
cc: djgpp AT delorie DOT com
Subject: Re: Question regarding application display
In-Reply-To: <01bcf893$c15b5340$63206ccb@ashod>
Message-ID: <Pine.SUN.3.91.971124132619.23713U@is>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Precedence: bulk


On 23 Nov 1997, Ashod wrote:

> I'm writing an app which runs in a dos-window, written in 
> DJGPP. I need to know how I can tell windows,
> to make my window swap from full screen to windowed dos
> box, how to maximise/minimise it, make its title flash
> when a I ask it to while your in windows gui and the
> app is minimised to the task bar,,,

Get Ralf Brown's Interrupt List from SimTel.NET and look inside
interNNc.zip (NN is the version number) for functions of interrupt 2Fh
around 1680h.  There are some functions there you should be able to
use.

For example, the function below is the way to switch your window
between full-screen and windowed display (simulate Alt-Enter press):

--------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