Problem with Animation Event

Hi，is there any way to extend AnimationEvent to have customize paraparameters and how can I use CustomEditor to make AnimationWindowEvent Inspector has some change？It is a protectd class。 All I want to do is link customize gamedata in AnimationClip，for example,when AnimationEvent trigged，I can play some soundeffect，or make GameObject to know what attack effect will happen。。。Thank you 。