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  changeborder                                                          WNDWC
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  Function       Changes the border to a new border style.
  Syntax         void changeborder( int newbrdr );
  Remarks        The original border style is already saved in viewbrdr.  The
                 current border is changed by searching for a match of wsbrdr
                 for each border part with the current attribute.  If a match
                 is found, it is replaced with newbrdr.  Tees as well as
                 virtual borders are also replaced.  The original border can
                 later be restored with restoreborder.
  Return value   None.
  Screens        All video pages.
  EOS            Restored to CRT.
  Restrictions   NO_BORDER is ignored as either the original or new border.
  Upon return    Forced to write to CRT.