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: DBMS Name
The name of the product accessed by the provider—for example, "ORACLE Server" or, for Microsoft® Excel, "Excel".