DisplayOBJ  METHODS

  Remember that the Toolkit includes the global instance Monitor which
  is a pointer to a DisplayOBJ. Use this instance pointer with the syntax
  Monitor.method, rather than creating a new instance.

  function  SnowProne:boolean
  function  GetMode:byte
  function  ColorOn:boolean
  procedure SetBW(On:boolean)
  function  DisplayType:tVideo
  function  BaseOfScreen:pointer;
  function  Width:byte
  function  Depth:byte
  function  SetCondensed:byte;
  procedure Set25;