SET(STATUS_LINE)

  Sets or changes the attributes of the status line -- the last line in a
  window -- for displaying regular text or status information about the
  window or its buffer.

  Syntax

     SET (STATUS_LINE, window, {NONE | BOLD | BLINK |
         REVERSE | UNDERLINE | SPECIAL_GRAPHICS}, string);

  Parameters

     window     The window for which the status line is to be set.

     NONE       To apply no video attributes to the characters.

     BOLD       To make characters bolded.

     BLINK      To make characters blink.

     REVERSE    To make characters appear in reverse video.

     UNDERLINE  To make characters underlined.

     SPECIAL_GRAPHICS
                To display graphic characters from the DEC Special Graphics
                Set (or VT100 Line-Drawing Character Set), such as a solid
                line.  For more information, see the programming manual for
                the video terminal you are using.

     string     The text to be displayed on the status line (such as the
                name of the buffer in the window).  If you want no text in
                the status line, use a null string ("").

  Example

  1.  SET (STATUS_LINE, main_window, REVERSE, "MAIN BUFFER:  newfile.txt");

      Sets the status line for the main window to display the quoted text in
      reverse video.

  2.  SET (STATUS_LINE, second_window, NONE, "");

      Removes the status line for the second window by setting the final
      parameter to a null string.

  3.  The following statements draw a solid line across the status line:

          y := "qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq" +
               "qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq"
          x := CREATE_WINDOW (1, 20, OFF);
          MAP (x, current_buffer);
          SET (STATUS_LINE, x, SPECIAL_GRAPHICS, y);