How can I update form on resize on 64-bit window?

Question

I have a problem with contents on a form is not updated correct when running in 64-bit window like Windows Server 2003 or 2008. There is a short video that illustrate this at screencast.

When I resize the main window the content is not repainted. But if I change the small splitter it is repainted. And everything works perfect on a 32-bit Windows. I have not made any OnResize events for this.

Any ideas ?

EDIT: Yes, the executable is 32-bit. It is only the Windows OS that is 64-bit.

No reason why it should behave differently on 64 bit OS. I've never seen such problems on 64 bit OS. — David Heffernan, Oct 24 '11 at 12:34
Maybe a wrong cast (32/64-bit mismatch) somewhere in a message handler (WM_SIZE, ...) in one of the used components? — Uli Gerhardt, Oct 24 '11 at 12:34
I'd suspect the graphics driver on the server. They are often poor. — mj2008, Oct 24 '11 at 12:57
From the screencast it doesn't look like only a painting problem. I believe @Lars got it right. — Ondrej Kelle, Oct 24 '11 at 14:12

score 8 · Accepted Answer · edited May 23 '17 at 11:55

8

This is caused by having to many nested controls/windows. The stack size of 64bit Windows is smaller than on 32bit. This gets even smaller if there are global WH_CALLWNDPROC hooks. The WM_SIZE message event handling gets a stack overflow which the Windows kernel eats. See here and a fix here. Also see here for the same problem.

PS: WinForms also suffer from the same problem.

edited May 23 '17 at 11:55

Community

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answered Oct 24 '11 at 14:08

Lars Truijens

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First answer that seems to be real, thanks. We will investigate this. – Roland Bengtsson Oct 25 '11 at 07:15

How can I update form on resize on 64-bit window?

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