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From: lsr@Apple.COM (Larry Rosenstein)
Newsgroups: comp.sys.mac.programmer
Subject: Re: How's the screen cleaned after _SysError?
Message-ID: <6959@internal.Apple.COM>
Date: 28 Feb 90 18:55:41 GMT
References: <34252@news.Think.COM>
Sender: usenet@Apple.COM
Organization: Objects-R-Us,  Apple Computer, Inc.
Lines: 15

In article <34252@news.Think.COM> ephraim@Think.COM (Ephraim Vishniac) 
writes:
> How is the screen restored after a call to _SysError?

There's a low memory global called DSAlertRect.  In GetMouse, if the high 
bit of DSWndUpdate is 1, then the system refreshes the rectangle stored in 
DSAlertRect.

Since this doesn't seem to be documented, use at your own risk.

Larry Rosenstein, Apple Computer, Inc.
Object Specialist

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