While other handlers have symmetric Add/Remove methods, this is different for an OnEnabledChanged <--> OnEnableChanging handler:

procedure AddHandlerOnEnabledChanged(const OnEnabledChangedEvent:
TNotifyEvent; AsFirst: boolean = false);
procedure RemoveHandlerOnEnableChanging(const OnEnableChangingEvent:
TNotifyEvent);

What's the correct name of the event:
OnEnabledChanged - matches chtOnEnabledChanged
or
OnEnableChanging - looks incorrect
???

DoDi