Library /sys$common/syshlp/ctf$help.hlb DEFINE/KEY, /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
 	remains in effect until a DEFINE/KEY/NOSET_STATE command is
 	issued to unset the state.

 	The default is /NOLOCK_STATE, meaning that the effect of
 	/SET_STATE lasts only until the next definable key that you
 	press or the next read-terminating character that you type.