Generation of some of the Windows NT event log messages can be controlled by the EventLogFlags value in the registry. To enable the generation of a specific event, the fields controlling that event must be turned on (set to 1). The bit-field mask and the event log messages they control are given below.
| Mask Value | Controlled Event |
|---|---|
| 0x00000001 | Class for extension extension unknown. Sample file: file. See Error Messages for details. |
| 0x00000002 | One or more embeddings in file file could not be filtered. See Error Messages for details. |
| 0x00000004 | The content index could not filter file file. The filter operation was retried number times without success. See Error Messages for details. |