If you're using the SDK and are instantiating a CustomMonitoringEvent class, it comes with a LevelID property which holds an int. The value of that property determines the severity level the event is assigned, with the following mapping:
- 1-Error
- 2-Warning
- 4-Information
- 8-Success Audit
- 16-Failure Audit
I found this via Google on the MSDN SDK web site, embedded in sample code. I didn't want to have to try to do that again.
Curious, see the original site here: http://msdn.microsoft.com/en-us/library/bb437567.aspx
