The PR_CONVERSATION_TOPIC property contains the topic of the first message in a conversation thread.
| Header file: | MAPITAGS.H |
| May be exposed by: | Message objects |
| Identifier: | 0x0070 |
| Property type: | PT_TSTRING |
| Property tag: | 0x0070001E (0x0070001F for Unicode) |
A conversation thread represents a series of messages and replies. The PR_CONVERSATION_TOPIC property is set for the first message in a thread, usually to the PR_NORMALIZED_SUBJECT property. Subsequent messages in the thread should use the same PR_CONVERSATION_TOPIC without modification.
The PR_CONVERSATION_INDEX property indicates the order relationship between subsequent messages and replies. Its use is optional, even if PR_CONVERSATION_TOPIC is set.
A message store provider has the option of assuring that PR_CONVERSATION_TOPIC is always set on incoming or outgoing messages. If PR_CONVERSATION_TOPIC is already set it should not be altered. If not, it can be set to PR_NORMALIZED_SUBJECT. Any action should be taken before IMAPIProp::SaveChanges is called.