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From: lsr@apple.UUCP (Larry Rosenstein)
Newsgroups: comp.sys.mac
Subject: Re: multifinder queries & HyperCard annoyances
Message-ID: <6209@apple.UUCP>
Date: Fri, 11-Sep-87 17:12:37 EDT
Article-I.D.: apple.6209
Posted: Fri Sep 11 17:12:37 1987
Date-Received: Sat, 12-Sep-87 20:36:16 EDT
References: <809@newton.physics.purdue.edu> <4060@utai.UUCP>
Reply-To: lsr@apple.UUCP (Larry Rosenstein)
Organization: Advanced Technology Group, Apple Computer
Lines: 42
Keywords: HyperCard

In article <4060@utai.UUCP> dudek@ai.UUCP (Gregory Dudek) writes:
>
>	Does anybody know how you can tell you're running in this environment?
>I presume that the switcher globals are still used, but how do you know

I have a review copy of a Tech Note on Multifinder.  (Since it hasn't been
oficially released, I won't go into specific details, but just give you the
basic ideas.)

The question is why do you need to know whether you are running under
Multifinder?  Usually, you just want to know if one of the Multifinder
features is available (eg, WaitNextEvent, temporary memory allocation, etc.)

In this case, you just see if the appropriate trap is implemented or not.

Multifinder does not use the same Switcher globals, since its does not
provide the same programmatic interface.  (If it did use the same globals,
applications that could work directly with Switcher might get confused.)  In
fact, part of the test to see if Multifinder is installed is to check the
Switcher globals to make sure Switcher is not running.

>	If you do a sublaunch, I thought this adds another partition
>with the new program in it.  Presumably your program exits at this
>point as it used to?  Is there a way to fork off a new partition and
>application WITHOUT closing the current application?

Tech Note #126 describes how to do sublaunching, by passing extra
parameters to the Launch trap.  I believe that if you follow this Tech
Note, then Multifinder will launch the application in its own partition
without terminating the parent.



-- 
Larry Rosenstein

Object Specialist
Apple Computer

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