Versions of comctrl32.dll ?? Edward Koryagin
--- On Tue, 16/2/10, Kyley Harris <ky...@harrissoftware.com> wrote: > From: Kyley Harris <ky...@harrissoftware.com> > Subject: Re: [DUG] Is it a bug in latest version of Delphi? > To: "NZ Borland Developers Group - Delphi List" <delphi@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 <kreyno...@chocfishsoft.co.nz> > wrote: > > On Tue, Feb 16, 2010 at 4:43 PM, Kyley > Harris <ky...@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 > > _______________________________________________ > > NZ Borland Developers Group - Delphi mailing list > > Post: delphi@delphi.org.nz > > Admin: http://delphi.org.nz/mailman/listinfo/delphi > > Unsubscribe: send an email to delphi-requ...@delphi.org.nz > with Subject: unsubscribe > > > > > -- > Kyley Harris > Harris Software > +64-21-671-821 > > > > -----Inline Attachment Follows----- > > _______________________________________________ > NZ Borland Developers Group - Delphi mailing list > Post: delphi@delphi.org.nz > Admin: http://delphi.org.nz/mailman/listinfo/delphi > Unsubscribe: send an email to delphi-requ...@delphi.org.nz > with Subject: unsubscribe _______________________________________________ NZ Borland Developers Group - Delphi mailing list Post: delphi@delphi.org.nz Admin: http://delphi.org.nz/mailman/listinfo/delphi Unsubscribe: send an email to delphi-requ...@delphi.org.nz with Subject: unsubscribe
