Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!microsoft!philba
From: philba@microsoft.UUCP (Phil BARRETT)
Newsgroups: comp.windows.ms
Subject: Re: Windows 3.0 (Protected mode apps)
Message-ID: <54931@microsoft.UUCP>
Date: 30 May 90 01:29:33 GMT
References: <6564@umd5.umd.edu> <DSAMPSON.90May25083700@x102a.harris-atd.com> <1990May25.165832.29650@agate.berkeley.edu>
Reply-To: philba@microsoft.UUCP (Phil BARRETT)
Organization: Microsoft Corp., Redmond WA
Lines: 18

In article <1990May25.165832.29650@agate.berkeley.edu> ilan343@violet.berkeley.edu writes:
>Does MSW 3.0 include a DOS extender? How do I develop protected mode
>applications to run under 3.0?  I assume I would need a compiler and
>linker that generate code for the extender.  Did Microsoft announce any
>development tools for this purpose?
>

If one follows a simple set of rules (documented in the SDK and elsewhere),
the app will run in Standard or Enhanced mode.   The rules are the same for
any protected mode SW -- no segment arithmetic, dont use seg regs for
temporaries,  dont write off the end of segments, ...  You can even write
applications that run under 2.x and 3.0, all modes -- there are a number
of apps today that do that (MS Excel and WfW are 2 examples). 


Phil
The above opinions are mine and not necessarily representative of 
my employer.