Combat event
 

Is there an event that fires when the player enters or leaves combat?

EDIT: Nevermind, Problem solved.

Well, there's this: http://wowprogramming.com/docs/event...R_ENTER_COMBAT

But I think what you really want is these two:
http://wowprogramming.com/docs/event...REGEN_DISABLED
http://wowprogramming.com/docs/event..._REGEN_ENABLED

PLAYER_REGEN_DISABLED entering combat
PLAYER_REGEN_ENABLED leaving combat