Call AddNotify to register an interest in change notifications. After a call to AddNotify, the object is notified every time the component changes, until it unregisters its interest by a call to the RemoveNotify method. 

ANotify is the object to notify of changes. It should implement an interface that allows the notifying component to call it when changes occur. What interface this is depends on the component that implements INotifyList. 

RemoveNotify