Path: utzoo!utgpu!water!watmath!clyde!rutgers!iuvax!pur-ee!uiucdcs!uxc.cso.uiuc.edu!uxe.cso.uiuc.edu!swofford
From: swofford@uxe.cso.uiuc.edu
Newsgroups: comp.sys.mac
Subject: Re: (LSC) Deep Dark Secrets Wanted!
Message-ID: <46100057@uxe.cso.uiuc.edu>
Date: 24 Jan 88 23:37:00 GMT
References: <870111@hpcilzb.HP.COM>
Lines: 35
Nf-ID: #R:hpcilzb.HP.COM:870111:uxe.cso.uiuc.edu:46100057:000:2122
Nf-From: uxe.cso.uiuc.edu!swofford    Jan 24 17:37:00 1988


steele@unc.cs.unc.edu(Oliver Steele) writes in comp.sys.mac that  
tedj@hpcilzb.HP.COM (Ted Johnson) writes:

>>	(2)make a DA live forever (i.e., remain active across launching
>>           different applications from the non-multi Finder), unless
>>           you explicitly close it by clicking on it's close box.
>>	   I assume this means patching one or more of the ROM routines....   
>
>Set the DA up to launch a VBL task.  I think da-insect at sumex has
>C source for this.
>
	There is also an undocumented low memory global called 'CloseOrnHook'
which defines a routine which is called by the system when a DA (or any DRVR, I
believe) is to be called.  You can put your own routine in here which will get
called by the system when it tries to send your DA a goodbye kiss.  At this time
you can check to see how the kiss was generated (System, Close Box, Close Menu,
etc) and then act appropriately.
	For more information on 'CloseOrnHook' check out an article by David
Dunham (miniWriter, ACTA, etc.) in Volume II of Best of MacTutor.

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