> This is why I talk about OS. If your ANSI/MBCS encoding is UTF-8 (I
> doubt Windows uses it in any locale) it will work.
>
> You need to pass your filenames using the ANSI/MBCS encoding.

So there isn't way to pass unicode file name to fbclient.dll? Or will
this in future plan of firebird?

I ask this question is because Delphi 2009 start support Unicode and
it is a normal practice and expectation that we will pass the
connection string as unicode too.