ChangeEvent
void ChangeEvent(Event* event,
ChangeEvent(¬ify, endp);
ChangeEvent(¬ify, endp);
ChangeEvent(¬ify, endp);
ChangeEvent(¬ify, endp);
ChangeEvent(¬ify, endp);
ChangeEvent(¬ify, endp);
void ChangeEvent(BMessage* msg, BMidiEndpoint* endp);