OnBeforeMessageSavedEventHandler DelegateKentico 8.1 API Reference
Refferences to the method called mefore message is saved.

Namespace: CMS.MessageBoards
Assembly: CMS.MessageBoards (in CMS.MessageBoards.dll) Version: 8.0.0.0 (8.1.5347.20411)
See Also
CMS.MessageBoards Namespace