NOTIFY(H, eventname) notifies listeners added to the event named 
eventname for handle object array H that the event is taking place. 
eventname can be a string scalar or character vector.  
H is the array of handles to the event source objects, and 'eventname'
must be a character vector.
NOTIFY(H,eventname,ed) provides a way of encapsulating information 
about an event which can then be accessed by each registered listener.
ed must belong to the EVENT.EVENTDATA class.
See also SWPREF, SWPREF/ADDLISTENER, SWPREF/LISTENER, EVENT.EVENTDATA, EVENTS Help for swpref/notify is inherited from superclass HANDLE
Reference page in Doc Center
   doc swpref/notify