## 19.12. Registering Event Log on Windows

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 To register a Windows event log library with the operating system, issue this command:

```
regsvr32 pgsql_library_directory/pgevent.dll

```

 This creates registry entries used by the event viewer, under the default event source named `PostgreSQL`.

 To specify a different event source name (see [event\_source](runtime-config-logging.html#GUC-EVENT-SOURCE)), use the `/n` and `/i` options:

```
regsvr32 /n /i:event_source_name pgsql_library_directory/pgevent.dll

```

 To unregister the event log library from the operating system, issue this command:

```
regsvr32 /u [/i:event_source_name] pgsql_library_directory/pgevent.dll

```

### Note

 To enable event logging in the database server, modify [log\_destination](runtime-config-logging.html#GUC-LOG-DESTINATION) to include `eventlog` in `postgresql.conf`.

