Arguments

command_context
   type:       $SCA_COMMAND_CONTEXT
   access:     read/write
   mechanism:  by reference

   SCA command context value.

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

   An SCA subsystem command.

parameter_routine
   type:       procedure
   access:     read only
   mechanism:  by reference

   Routine that prompts for required parameters. You can specify
   LIB$GET_INPUT or a compatible routine. If a routine address of
   zero (0) is specified, commands with missing parameters fail and
   display a CLI error message.

continuation_routine
   type:       procedure
   access:     read only
   mechanism:  by reference

   Routine that prompts for the remainder of a continued command
   (i.e., a command that ends with a hyphen). You can specify
   LIB$GET_INPUT or a compatible routine.

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

   Command continuation prompt string (e.g., SCA> ).

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

   User-specified value to be passed to any action routine (other
   than CLI prompt routines) called by this routine.

confirm_routine
   type:       procedure
   access:     read only
   mechanism:  by value

   Command confirmation prompt routine to be used by commands that
   support a /CONFIRM qualifier. You can specify SCA$GET_INPUT or
   a compatible routine. If this argument is omitted, the /CONFIRM
   qualifier is not supported.

topic_routine
   type:       procedure
   access:     read only
   mechanism:  by value

   Help topic prompt routine. You can specify LIB$GET_INPUT or a
   compatible routine. If this routine returns an error, command
   processing is terminated. If this argument is omitted, no help
   prompting is performed.

display_routine
   type:       procedure
   access:     read only
   mechanism:  by value

   Routine to be called to display one line of command output. You
   can specify SCA$PUT_OUTPUT or a compatible routine. If this
   routine returns an error, command processing is terminated. If
   this argument is omitted, no display routine is called.