Library /sys$common/syshlp/latcp$help.hlb DEFINE, /KEY, Qualifiers, /LOCK_STATE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /LOCK_STATE
       /NOLOCK_STATE

    Specifies that the state set by the /SET_STATE qualifier remain
    in effect until explicitly changed. If you use the /NOLOCK_STATE
    qualifier, the state set by /SET_STATE remains in effect only
    for the next definable key that you press or for the next read-
    terminating character (such as Return or Ctrl/Z) that you type.

    You can specify the /LOCK_STATE qualifier only with the /SET_
    STATE qualifier. If you do not specify the /LOCK_STATE or
    /NOLOCK_STATE qualifier, the default is that the state set by the
    /SET_STATE qualifier remains in effect until explicitly changed.