Library /sys$common/syshlp/tpuhelp.hlb SET(GLOBAL_SELECT_READ)  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  SET (GLOBAL_SELECT_READ)

  Specifies the program or learn sequence DECTPU should execute whenever it
  receives a Selection Request event on a global selection it owns.

  Syntax

     SET (GLOBAL_SELECT_READ, {SCREEN | buffer} [, {program_source | NONE}])

  Parameters

     SCREEN               A keyword indicating that the application's
                          default global selection read routine is to be
                          set.

     buffer               The buffer with which the global selection read
                          routine is to be associated.

     program_source       A string, buffer, range, learn sequence, or
                          program specifying the global selection read
                          procedure.  If you do not specify this parameter,
                          DECTPU deletes the current global selection read
                          procedure.

     NONE                 A keyword instructing DECTPU to delete the current
                          global selection read procedure.