Newsgroups: comp.lang.pascal
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!news.cs.indiana.edu!maytag!watstat.waterloo.edu!dmurdoch
From: dmurdoch@watstat.waterloo.edu (Duncan Murdoch)
Subject: Re: Overwrite TApplication.Init?
Message-ID: <1991Apr12.012228.3581@maytag.waterloo.edu>
Sender: news@maytag.waterloo.edu (News Owner)
Organization: University of Waterloo
References: <11841@j.cc.purdue.edu>
Date: Fri, 12 Apr 1991 01:22:28 GMT
Lines: 19

In article <11841@j.cc.purdue.edu> zhou@brazil.psych.purdue.edu (Albert Zhou) writes:
>It seems that overwriting TApplication.Init is very hazardous.
> I have tried to overwrite it in order to get a different background. 
>Here is the code:
>
>procedure mine.init; virtual;
>begin
>	Tapplication.init;
>	write a different background;
>end;
>
>Odd enough, this modification caused the system to be rebooted.

I don't think the problem is with TApplication, it's with your override.  
You should declare mine.init to be a constructor, not a virtual method.  
Virtual methods can't be called until after the object is constructed.

Duncan Murdoch
dmurdoch@watstat.waterloo.edu