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

[Karl Reynolds]

On Tue, Feb 16, 2010 at 2:50 PM, Kyley Harris <Kyley at harrissoftware.com> wrote:
> interesting
>>    if Longint(Result) = LB_ERR then Error(SListIndexError, Index);
> it would seem that the error is not in delphi at all. Well.. they are simply
> raising the Windows error which say that -1 is the error result for a bad
> index access from windows. if delphi were to ignore this error and you asked
> for the value at index[99] which was out of bounds and you got -1 instead of
> an error I think there would be the same number of complaints from the other
> side.
> Clearly its the windows API that considers -1 invalid.. not delphi.

The API help says:

"The return value is the value associated with the item, or LB_ERR if
an error occurs."

All that says is that if an error occurs, LB_ERR (-1) will be
returned. The reverse, that -1 indicates an error, does not logically
follow. If you want to know whether an error occurred or not,
GetLastError is the way to do it.

Cheers,
Karl