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Date Posted: 17:31:50 10/02/00 Mon
Author: Michel
Subject: Re: Resource leak again
In reply to: Peter 's message, "Re: Resource leak again" on 02:27:03 09/20/00 Wed


Hi Peter,

I have tested with MemProof and a multipage scan and have not reproduced a resource leak. I

did get a message, though indicating an invalid API call, "Destroy Icon: the parameter is

incorrect". I have not located the call yet, but I will continue to see ifthis may be the

cause of your problem.

Best regards,

Michel

> Thank You for your quick answer.
> The line with Graphic.Free is realy not so
> meaningfully.
>
> I have tested the same System with Adobe Acrobat.
> There
> are no problems.
>
> What can I do to fix the problem?
>
> Ciao Peter
>
> >
> > Dear Peter,
> >
> > Your code seems ok, except for the Graphic.Free after
> > the Exit call which will never be executed. You can
> > just remove that line because the finally block will
> > always free the
> > graphic, even if you have an Exit call.
> >
> > For the leak, it may be your twain driver. The first
> > thing I would do is try a multipage scan with another
> > program, for example, Imaging for Windows, and see if
> > the leak still occurs.
> >
> > Best regards,
> >
> > Michel
> >
> > > Hello,
> > >
> > > I have a problem scanning multiple images under
> > Win98.
> > > The free systemresources become smaller and
> smaller.
> > > To fix the problem I have minimized the
> > scanprocedure,
> > > but no success.
> > >
> > > procedure TMain.OnAcquire(const DibHandle: THandle;
> > > const XDpi : Word; const YDpi: Word; const
> > > CallBackData : LongInt);
> > > var
> > > Graphic: TDIBGraphic;
> > > begin
> > > Graphic := TDIBGraphic.Create;
> > > try
> > > Graphic.AssignFromDIBHandle(DibHandle);
> > > Graphic.XDotsPerInch := XDpi;
> > > Graphic.YDotsPerInch := YDpi;
> > > ImageScrollBox.Graphic := Graphic;
> > > if NOT LoescheDatei then begin
> > > exit;
> > > Graphic.Free;
> > > end;
> > > Application.BringToFront;
> > > // do NOTHING!
> > > finally
> > > Graphic.Free;
> > > end;
> > > end;
> > >
> > > I use a Epson Perfection 1000S with automatically
> > > documentfeed.
> > >
> > > Ciao Peter

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