- How can my program tell if it's running under Windows?

Date: 8 Feb 2002 20:37:06 -0400

 Execute INT 2F AX=4680. If AX returns 0, you're in Windows real mode or
 standard mode (or under the DOS shell). Otherwise, call INT 2F AX=1600.
 If AL returns something other than 0 or 80, you're in Windows 386
 enhanced mode. See PC Magazine 24 Nov 1992 (xi:20) pages 492-493.

 For more information, see PC Magazine 26 May 1992 (xi:10) pages 345-346.
 A program, WINMODE, is available as part of:
 <http://www.simtel.net/pub/pd/48500.html>
 <ftp://garbo.uwasa.fi/pc/pcmagvol/vol11n10.zip>

 PC Magazine 29 March 1994 (xiii: 6) pages 312 and 320 published a new
 program, WINVER. This would be in:
 <http://www.simtel.net/pub/pd/48540.html>
 <ftp://garbo.uwasa.fi/pc/pcmagvol/vol13n06.zip>

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