Error Lookup Service Registry Entries

Error lookup services are identified in the registry by the ExtendedErrors subkey under the class ID of the error lookup service. Under HKEY_CLASSES_ROOT, error lookup services must have the following subkeys and values for programmatic identifier (ProgID):

Keys and Subkeys Values
HKEY_CLASSES_ROOT
ProviderProgIDErrors FriendlyDisplayName
CLSID LookupCLSID
ProviderCLSID
ExtendedErrors FriendlyDisplayName
LookupCLSID Description or DisplayName
ProgID LookupProgID
VersionIndependentProgID VersionIndependentProgID
InprocServer32 ErrorLookupServiceDLLFilename
ThreadingModel Apartment|Free|Both

Note that the first two class ID entries are entered under the class ID of the provider to identify the error lookup service for that provider. For more information about error lookup services, see "Error Lookup Services" in Chapter 13.