Closing image shows memory error using as ActiveX

[Marcio]

Hello,

I'm having a big problem.
I'm developing an ActiveX application using Delphi 7, to show tiff images from web browser.
It is just simple open an image: Imaging1.CreateImageFromURL(Host, PathImg, 80).

The problem is when I try to close the image:
Imaging1.CloseImage(gdviewer1.GetNativeImage);
GdViewer1.Clear;
GdViewer1.ImageClosed;

When closing the browser, the Internet Explorer shows me an error of memory, then it closes, problably because the image is still opened, and Internet Explorer continues in memory, I have to kill manually the iexplore.exe process by the task manager:

AppName: iexplore.exe AppVer: 7.0.6000.16608 ModName: msvbvm60.dll
ModVer: 6.0.97.82 Offset: 0005208d

I think Internet Explorer closes faster than the ActiveX, so I can't trigger any kind of form destroy events: OnDestroy, OnDeactivate, to close the image.

Any ideas?

Thanks,
Marcio.

[Loïc]

Hi Marcio,

Could you send me your activex and a webpage wich show this behaviour ?

Best regards,

Loïc

[Marcio]

Hello Loic,
Thanks for your prompt answer.

Searching in the web I found out that in ActiveX the event onDestroy does not work.
We have to use the event BeforeDestruction, which isn't declared by default (when you create your application).

procedure BeforeDestruction; override;

procedure Twebtif.BeforeDestruction;
begin
Imaging1.CloseImage(gdviewer1.GetNativeImage);
GdViewer1.Clear;
GdViewer1.ImageClosed;
end;

Thanks,
Marcio.