win 32 - 1400 invalid windows Handle

Hi Asi!

Is it an exception or an error box? Try to go through your program step by step with the IDE debugger.

Regards, Madshi.

error box after the FormDestroy finished

This sounds as if you mess around with window handles inside Delphi components.
Concentrate on the changed handles.

Hi Madhsi,

I have the same problem when I handle with threads and there's something wrong in the thread. Somehow the resource interfere - I think - and this happens a lot when I access a TTreeView in my thread.

Good luck,
Martin

Hi Martin!

>> and this happens a lot when I access a TTreeView in my thread

Fact is that the VCL is not thread safe (shame on Borland). That means you should not access VCL components from other threads than the main thread. You can go around this problem by using pure win32 APIs for updating your tree view.

Regards, Madshi.

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