CASE, Sets case Sensitive flags, Will enable or disable all emulated behaviour for strings.

case {(options}
  Prefix with [(] for backward compatibility.
    f - Turn OFF case sensitivity.
    n - Turn ON case sensitivity.
    s - Suppresses output of the status message.
    h - This page.
  e.g.  (fs  (off and dont display the status)

No prefix.
  ON       - Turn ON case sensitivity.
  OFF      - Turn OFF case sensitivity.
  <<NULL>> - just show status.
  H        - This page.
  ?        - This page.
  HELP     - This page.

NOTE: Within jBASE case sensitivity is ON by default.