MDAC 2.5 SDK - OLE DB Programmer's Reference
Appendix C: OLE DB Properties
Property group: Data Source Information
Property set: DBPROPSET_DATASOURCEINFO
Type: VT_BSTR
Typical R/W: R
Description: Provider Version
Indicates the version of the provider. The version is of the form ##.##.####, where the first two digits are the major version, the next two digits are the minor version, and the last four digits are the release version. The provider can append a description of the provider.
This is the same as DBPROP_DBMSVER if the DBMS is the same as the provider—that is, if the DBMS supports OLE DB interfaces directly. It is different if the provider is separate from the DBMS, such as when the provider accesses the DBMS through ODBC.