VMS Help RTL Routines, DTK$, DTK$SET_MODE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   The Set the Mode for the DECtalk Terminal routine sets or resets the
   mode settings of the DECtalk terminal.

      Format:

        DTK$SET_MODE  voice-id [,new-mode] [,old-mode]

      Arguments:

   voice-id

   OpenVMS usage: identifier
   type:          longword (unsigned)
   access:        read only
   mechanism:     by reference

   Voice identifier of the DECtalk device.  The  voice-id  argument  is
   the address of an unsigned longword containing this identifier.  The
   voice identifier is returned by the DTK$INITIALIZE routine.

   new-mode

   OpenVMS usage: longword_unsigned
   type:          longword (unsigned)
   access:        read only
   mechanism:     by reference

   DECtalk mode to be set.   The  optional  new-mode  argument  is  the
   address of a longword bit mask containing the specified mode.  Valid
   values for new-mode are:

   o  DTK$M_SQUARE

   o  DTK$M_ASCII (valid for the DTC01 device only)

   o  DTK$M_MINUS

   o  DTK$M_EUROPE (valid for the DTC03 device only)

   o  DTK$M_SPELL (valid for the DTC03 device only)

   old-mode

   OpenVMS usage: longword_unsigned
   type:          longword (unsigned)
   access:        write only
   mechanism:     by reference

   Current mode settings of the DECtalk device.  The optional  old-mode
   argument  is  the  address  of a longword bit mask that receives the
   current DECtalk settings.