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From: dwal@midway.uchicago.edu (David Walton)
Newsgroups: comp.sys.mac.system
Subject: Re: How to add startup icon to one that doesn't?
Message-ID: <1990Jul20.001136.6842@midway.uchicago.edu>
Date: 20 Jul 90 00:11:36 GMT
References: <29956.26a4beb0@vaxb.acs.unt.edu>
Organization: U. Chicago Computing Organizations, Academic and Public Comp.
Lines: 55

In article <29956.26a4beb0@vaxb.acs.unt.edu> mouse@vaxb.acs.unt.edu (Dhanapong Saengrussamee-University of North Texas) writes:
>Howdy!
>
>  Following the subject of startup icon from my previous posted (about how to
>make AppleShare INIT not to clear the screen during booting in progress).  
>
>  What about those INITs and cdevs that do not show their startup icon?  Is
>their a way to patch/add something to it so that it will show its icon (at
>least) at startup?  (As mentioned in previous posted, I am very good at peeking
>& poking with ResEdit and stuffs....)


>-----------------------------------+------------------------------------------
>Dhanapong "Mouse" Saengrussamee    | AppleLink : U1364 | BITNET : mouse@untvax
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>PO Box 5155, Denton, TX 76203-5155 | Internet : mouse@vaxb.acs.unt.edu
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If an INIT doesn't show an icon at startup, it's not really possible
to hack it up so it does.  This sort of thing isn't managed by the
system, but by a procedure which Apple distributes (to anybody who
asks for it) for anybody who wants to include in in his her INIT.  For
that reason, if the routine wasn't included when the program was
linked, you wouldn't be able to just twiddle some bits and make the
call.  As it is, the icon that is displayed is generally based upon
runtime conditions (i.e., whether a certain installation procedure
succeeds), and hacking that in bit-wise would be a pain in the **s.

As far as AppleShare clearing the screen goes, it's a bad idea to muck
with that for a completely different reason.  AppleShare calls
_InitWindows, because in some situations it needs to draw status
information in a window (i.e., to tell the user that a volume is being
auto-mounted).  InitWindows is what clears the desktop.  If you were
to remove that call, AppleShare would, in the words of one Pete Helme,
"blow big chunks."

Pete also points out (this is in a Tech Note, by the way), that Apple
software engineers who write software that calls InitWindows are being
forcefully convinced that this is a Bad Idea, and will presumably mend
their ways in the future.


Hope this clears some things up.

David

-- 

David Walton		Internet: dwal@tank.uchicago.edu
University of Chicago   {  Any opinions found herein are mine, not  }
Computing Organizations {  those of my employers (or anybody else). }