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

[John Bird]

Did the D2007 version have the XP manifest?.....on the same machine (XP onwards)  a program using XPManifest does invoke the later version of common controls in COMCTRL32.DLL, so it is possible thats where the difference comes from.

Of course this is only plausible if one of them was using different versions of the controls/XP manifest.

I have noticed on Vista that programs without the manifest still seem to get it by default..if they are created from new with D2007.  An older program still invokes the old version of the controls even if recompiled under d2007 (unless the XP Manifest is added).

John
  ----- Original Message ----- 
  From: Kyley Harris 
  To: NZ Borland Developers Group - Delphi List 
  Sent: Tuesday, February 16, 2010 8:00 PM
  Subject: Re: [DUG] Is it a bug in latest version of Delphi?


  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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    >
    >
    > --
    > Kyley Harris
    > Harris Software
    > +64-21-671-821
    >
    >
    >

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  -- 
  Kyley Harris
  Harris Software
  +64-21-671-821



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