Dmitry,
>>Do you know if possible that a PC would have both the ODBC and the Native Client installed and that the app could choose which one to use?
Yep, if you use a connection string or named ODBC connection or dbc connection, you can choose the driver. I'm a fan of encrypted connection strings that can be left in app folders without leaving credentials exposed.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
