Data Source Initialization OLE DB Property — «unicode_mode»
Publishing of text data as UNICODE characters.
For IBProvider v1/v2
IBProvider v1/v2 has a limited support for the presentation of text data as UNICODE symbols. In general, do not recommended change this property.
For IBProvider v3
IBProvider v3 implements full support for UNICODE mode for all code pages FB/IB and data types. You can change this property without any problems.