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Date Posted: 17:29:11 09/19/00 Tue
Author: Michel
Subject: Re: Resource leak again
In reply to: Peter 's message, "Resource leak again" on 03:56:59 09/19/00 Tue

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,


> 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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