Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!uwm.edu!ogicse!zephyr.ens.tek.com!gvgpsa!treehouse!andyp
From: andyp@treehouse.UUCP (Andy Peterman)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Determining whether MultiFinder is present
Message-ID: <572@treehouse.UUCP>
Date: 10 Oct 90 05:24:36 GMT
References: <10540.270e461f@amherst.bitnet>
Organization: The Tree House
Lines: 29

In article <10540.270e461f@amherst.bitnet> mbabramowicz@amherst.bitnet writes:
>Tech Notes seem to say that you can't determine whether or not Multifinder is
>present. But Font/DA Mover seems to know whether it's present ...

This seems to come up every few months and there always seem to be a
multitude of hack answers.  Well, here's a way to determine if MF is
active that I've been using for 3 years and it continues to work flawlessly!
I asked DTS about this method a few years ago and I don't think I ever
got a straight answer, which to me means they couldn't find much wrong
with it.

Here's the C fragment:

...
WindowPtr window;
Boolean mfActive = TRUE;

GetWMgrPort (&window);
if (PtrZone ((Ptr)window) == GetZone())
	mfActive = FALSE;
...

Basically, it determines if the Window Manager port is in the same heap
as your application.  If it is, then MultiFinder is NOT running.  This
is basically a legal (i.e. supported) set of tests.  Do not use the 
WM port (window) if MultiFinder is active.

	Andy Peterman
	treehouse!andyp@gvgpsa.gvg.tek.com