Events

• An event is an action on the object
  
• Event is an encapsulation of some input delivered asynchronously to the application.
  
• Events are generated by user interaction with the GUI, like a button pressed and they may also occur without user interaction like, when a timer expires, a counter exceeds a value, or an operation is completed.
  
• An event takes two arguments. They are
  
  • Type of the object
    
  • It varies from argument to argument.