ADO is actually intended and used for a lot more than databases, though that is its primary application. The area of application was significantly widened with ADO 2.1 and again with ADO 2.5, to the point where ADO 2.5 is the baseline version now. ADO 2.6 added named parameters for Commands and some SQL Server enhancements. Most everything after ADO 2.6 was security overhauls and more enhancements for newer versions of SQL Server (with a few Oracle things thrown in there). The Stream object of ADO 2.5 and later is almost a topic in itself, good for doing text and binary I/O and converting among various Unicode encodings. Articles and reference material can be found on your MSDN CDs. You do have those CDs right? That's where the VB6 manuals are for example so they're sort of important. The best edition is October 2001 but anything from just before that time is useful too if you never ordered your updates. Online the starting point is http://msdn.microsoft.com/en-us/library/ms678262(VS.85).aspx
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