The FS_OCD_STRIKETHRU_ON box contains the command which enables the strikethrough simulations for a printer.
The Diconix 150 Plus printer does not support strikethrough text; therefore, the FS_OCD_STRIKETHRU_ON box is empty.
The HP LaserJet IIP printer does not support strikethrough text; therefore, the FS_OCD_STRIKETHRU_ON box is empty.