Search notes:

Registry: HKEY_CLASSES_ROOT\CLSID\{class-id-of-OLE-DB-Provider}

An OLE DB provider is identified in the registry by a OLE DB Provider subkey under HKEY_CLASSES_ROOT\CLSID\{class-id-of-OLE-DB-Provider}

The following registry subkeys and values are required for OLE DB Providers:

key	name	value	Example value
`HKCR\CLSID\{oledb-provider-clsid}`	default value	Version independent prog id	OraOLEDB.Oracle
`HKCR\CLSID\{oledb-provider-clsid}`	`OLEDB_SERVICES`	Supported services	0xffffffff
`HKCR\CLSID\{oledb-provider-clsid}\Extended Errors`	default value	Extended Error Service	Extended Error Lookup Service
`HKCR\CLSID\{oledb-provider-clsid}\Extended Errors\{clsid}`	default value	Friendly display value	Oracle OLE DB Error Lookup
`HKCR\CLSID\{oledb-provider-clsid}\InprocServer32`	default value	DLL file path	`C:\oracle\18c\bin\OraOLEDB18.DLL`
`HKCR\CLSID\{oledb-provider-clsid}\InprocServer32`	`ThreadingModel`	`Apartment` or `Free` or `Both`
`HKCR\CLSID\{oledb-provider-clsid}\OLE DB Provider`	default value	description	Oracle Provider for OLE DB
`HKCR\CLSID\{oledb-provider-clsid}\ProgId`	default value	Prog Id of provider	`OraOLEDB.Oracle.1`
`HKCR\CLSID\{oledb-provider-clsid}\VersionIndependentProgID`	default value	Version independent Prog Id	`OraOLEDB.Oracle`

VersionIndependentProgID

The value of the version independent prog id (VersionIndependentProgID) needs to be supplied to the provider key in an OLE DB connection string.

See also

This VBS script tries to find OLE DB providers based on the presence of the OLEDB_SERVICES value under a HKCR\CLSID class id.

Links

docs.microsoft.com: Provider Registry Entries