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Providers are identified in the registry by the OLE DB Provider subkey under the class ID of the provider. Under HKEY_CLASSES_ROOT, providers must have the following subkeys and values for the extension of persisted data source object files and for the programmatic identifier.
Keys and subkeys |
Name |
Value |
|---|---|---|
HKEY_CLASSES_ROOT |
||
CLSID |
||
ProviderCLSID |
(Default) |
VersionIndependentProgID |
OLEDB_SERVICES |
SupportedServices[1] |
|
ExtendedErrors[2] |
(Default) |
Extended Error Service |
ErrorLookupCLSID[2] |
(Default) |
FriendlyDisplayName |
InprocServer32 |
(Default) |
ProviderDLLFilename |
ThreadingModel |
Apartment|Free|Both |
|
OLE DB Provider |
(Default) |
Description |
ProgID |
(Default) |
ProviderProgID |
VersionIndependentProgID |
(Default) |
VersionIndependentProgID |
ProviderProgID |
(Default) |
Description |
Clsid |
(Default) |
ProviderCLSID |
[1] Generally 0xffffffff.
[2] If Error Lookup Service is supported.
When an instance of the object is first created, providers return an interface pointer on a data source object. For more information about data source objects, see Data Source Objects (OLE DB).