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application: the DBMS, the ADO provider, Perl and some perl modules.

In short: Perl 5.8 and Win32::OLE 0.16 (or later) are strongly
recommended and Win32::OLE has to be prepared to use the correct
codepage:

  Win32::OLE->Option( CP => Win32::OLE::CP_UTF8 );

More detailed notes can be found at

  http://purl.net/stefan_ram/pub/perl_unicode_en

=head2 ADO providers

=over

=item SQLOLEDB may truncate inserted strings

It seems that the size of the first inserted string is sticky.
Inserted strings longer than the first one are truncated.