content: REM : **** This class is the base class of all the viewControllers in the app ****
       '**** Any ViewController that extends this class will have access to all vairalbes & methods used in this class **** 
       
  REM : **** This the the default init method to initialize all the common variables ****
  sub init()
  end sub
  
  REM : **** Default Implementations ****
  sub onSetInitialFocus()
  end sub