Provides help on CDO commands and CDO concepts.

 HELP ──────┬───────────────>──────────────────┬──>
            └─> topic ──┬─────────>──────────┬─┘
                        └─┬─> subtopic ─┬────┘
                          └───────<─────┘

Additional information available:

topicsubtopicExamples

 Specifies the topic about which you are requesting information.  If you
 specify an incomplete topic name, information on all topics starting
 with that string is displayed.  If you specify wildcard characters,
 information of all matching topics is displayed.

 If you do not specify a topic, a list of all available topics is
 displayed, followed by a request for a topic.

 Specifies the subtopic about which you are requesting information.

 The following command requests information on the DIRECTORY command.

 CDO> HELP DIRECTORY

 The following command requests information on the DEFINE PROTOCOL
 command.  ("PROTOCOL" is the subtopic.)

 CDO> HELP DEFINE PROTOCOL