The LBR$OUTPUT_HELP routine outputs help text to a user-supplied
    output routine. The text is obtained from an explicitly named
    help library or, optionally, from user-specified default help
    libraries. An optional prompting mode is available that enables
    LBR$OUTPUT_HELP to interact with you and continue to provide help
    information after the initial help request has been satisfied.

    Format

      LBR$OUTPUT_HELP  output_routine [,output_width] [,line_desc]

                       [,library_name] [,flags] [,input_routine]