[DUG] Is it a bug in latest version of Delphi?

[Kyley Harris]

i have both versions of delphi on the same machine. ran both tests at the
same time. weird

On Tue, Feb 16, 2010 at 7:43 PM, Edward Koryagin <ed_iv2001 at yahoo.co.nz>wrote:

> Versions of comctrl32.dll ??
>
> Edward Koryagin
>
>
> --- On Tue, 16/2/10, Kyley Harris <Kyley at harrissoftware.com> wrote:
>
> > From: Kyley Harris <Kyley at harrissoftware.com>
> > Subject: Re: [DUG] Is it a bug in latest version of Delphi?
> > To: "NZ Borland Developers Group - Delphi List" <delphi at delphi.org.nz>
> > Received: Tuesday, 16 February, 2010, 5:03 PM
> > the fact that it behaves different under
> > delphi 7 and Delphi 2007 on the same machine implies that
> > there is some strange mystery at work in the compiled code
> > that is not obvious. its not a direct problem of the
> > underlying windows API.
> >
> > As to using the GetLastError..
> > There is issue I have with relying on that
> > rather than the -1. The MSDN documentation states that not
> > all routines need to or are required to call SetLastError(0)
> > on success, and only set it on failure. the value -1 is what
> > you are supposed to analyze to determine IF you should check
> > GetLastError. GetLastError is not the first test. Clearly
> > microsoft does not intend the storage to be used for
> > negative values even if some appear to work.
> >
> > if you rely on GetLastError rather than the -1.
> > you may get a true value of "3" but getlasterror
> > was not reset from some other call and you can get a false
> > fail.
> >
> >
> >
> > On Tue, Feb 16, 2010 at 4:55 PM,
> > Karl Reynolds <kreynolds at chocfishsoft.co.nz>
> > wrote:
> >
> > On Tue, Feb 16, 2010 at 4:43 PM, Kyley
> > Harris <Kyley at harrissoftware.com>
> > wrote:
> >
> > > I'll add my cents..
> >
> > > under Delphi 7, getlasterror returns error 1413 as
> > Karl said.. under Delphi
> >
> > > 2007 no errors whatsoever. whats clear is that
> > Getlasterror is unlreliable
> >
> > > in this situation as Microsoft says, because microsoft
> > online help says the
> >
> > > getlasterror value cannot be controlled depending on
> > OS and device and only
> >
> > > the -1 is reliable as an answer.
> >
> >
> >
> > Except that -1 isn't reliable because, as already
> > discussed, it could
> >
> > be a valid data value. I would in fact expect the code
> > returned to
> >
> > vary by OS and device (and that's what RaiseLastOSError
> > is for) but I
> >
> > really didn't expect there to be an OS or device on
> > which an
> >
> > LB_GETITEMDATA request out of the range of the listbox
> > wasn't an
> >
> > error! Evidently I'm too trusting or something.
> >
> >
> >
> > Under the circumstances, checking the bounds first seems
> > necessary.
> >
> >
> >
> > Cheers,
> >
> > Karl
> >
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> >
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> >
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> >
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> >
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> >
> >
> >
> >
> > --
> > Kyley Harris
> > Harris Software
> > +64-21-671-821
> >
> >
> >
> > -----Inline Attachment Follows-----
> >
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>
>
>
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-- 
Kyley Harris
Harris Software
+64-21-671-821
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