[DUG] EAccessViolation on StdWndProc

[Leigh Wanstead]

The software is ok.  I have not used madExcept. So I can not compare.

But I reported a serious bug related to com object exception handling logic
and they fixed in later version. I requested to get that fix for free by
email and online support forum. No reply whatever. I consider that business
practise extremely bad.

-----Original Message-----
From: delphi-bounces at delphi.org.nz
[mailto:delphi-bounces at delphi.org.nz]On Behalf Of Nick
Sent: Wednesday, October 03, 2007 2:30 PM
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] EAccessViolation on StdWndProc


Just a side question.
EurekaLog any good? Worth the monies? Is it > then madExcept?


Leigh Wanstead wrote:
> Hello everyone,
>
> I got EAccessViolation on StdWndProc on customer machine
>
> The development environment is Delphi 7 Enterprise. The customer's os are
> Windows 2003 and xp.
>
> Exception Message is:
>
> Access violation at address 00000000 Write of address 00000000
>
> The whole call stack from EurekaLog v 5.x log is
>
> classes.pas StdWndProc
> user32.dll DispatchMessageA
> user32.dll DispatchMessageA
> Forms.pas TApplication.ProcessMessage
> Forms.pas TApplication.ProcessMessage
> Forms.pas TApplication.HandleMessage
> Forms.pas TApplication.HandleMessage
> Forms.pas TApplication.Run
> Forms.pas TApplication.Run
> MyProject.dpr
>
> function StdWndProc(Window: HWND; Message, WParam: Longint;
>   LParam: Longint): Longint; stdcall; assembler;
> asm
>         XOR     EAX,EAX
>         PUSH    EAX
>         PUSH    LParam
>         PUSH    WParam
>         PUSH    Message
>         MOV     EDX,ESP
>         MOV     EAX,[ECX].Longint[4]
> -->        CALL    [ECX].Pointer
>         ADD     ESP,12
>         POP     EAX
> end;
>
> I can not duplicate the error on my own machine on xp and windows 2000
> terminal server. It happens random on customer machine. May I ask how to
do
> in code to catch the error?
>
> TIA
>
> Regards
> Leigh
>
>
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