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  wlineh                                                                WNDWC
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  Function       Places a horizontal line in the window using the window line
                 set.
  Syntax         void wlineh( unsigned char row, unsigned char col,
                              unsigned char cols );
  Remarks        This routine divides a window using wsline and wndwattr from
                 the top window record.  It provides just a horizontal line
                 using part BRDR_HL.  If wndwattr is set to SAMEATTR, then
                 the attributes will remain the same on the screen.  If
                 wsline=nobrdr, then the function does nothing.
  Return value   None.
  Screens        All video pages and virtual screens.
  EOS            Updated.
  Restrictions   Stay within window limits.  Cannot use NO_BORDER.