
  { This type declaration defines the class of the window.  PRE_EMPT means that this type of window takes
  { precedence over other windows.  It will be about ten rows in size and the title line will blink.
  { INVISIBLE means that this window is not displayed on the console.  It is currently not being viewed yet
  { it still exists.  All other windows are defined as SHARING.  The rows allocated to these windows will
  { vary depending on the other type of windows.

  TYPE
    dpt$window_class = (dpc$wc_pre_empt, dpc$wc_sharing, dpc$wc_invisible);
