Arguments

string
   type:       character string
   access:     read only
   mechanism:  by descriptor

   String to be written to SYS$OUTPUT. You can concatenate one or
   more additional character strings with the primary string to form
   a single output record. You can specify a maximum of 20 strings.
   The maximum resulting record length is 255 characters.

user_argument
   type:       _UNSPECIFIED
   access:     read only
   mechanism:  by reference

   User-specified value that was passed to the routine that called
   this action routine.