For more information about the specific registration entries for OLE, see the OLE documentation included in the Win32 SDK.
Applications that support OLE use the registry as the primary means of defining class types, operations, and properties for data types supported by those applications. You store OLE registration information in the HKEY_CLASSES_ROOT key in subkeys under the CLSID subkey and in the class description's (Prog ID) subkey.
Note
For more information about the specific registration entries for OLE, see the OLE documentation included in the Win32 SDK.