The CDO libraries call Microsoft COM and MAPI interfaces for you. The following table describes the MAPI interfaces that the CDO Library calls when you manipulate a CDO Library object.
| CDO Library object |
COM or MAPI interface called by the CDO Library |
|---|---|
| AddressEntry | IMailUser |
| AddressEntryFilter | IMAPITable (with Restrict method) |
| AddressList | IABContainer |
| Attachment | IAttach |
| Field | IMAPIProp, IStream |
| Folder | IMAPIFolder |
| InfoStore | IMsgStore |
| Message | IMessage |
| MessageFilter | IMAPITable (with Restrict method) |
| Recipient | IMAPITable row (recipient table from IMessage) |
| Session | IMAPISession |
For collection objects, the CDO libraries call the MAPI interface IMAPITable.
The CDO libraries also call the MAPI interface IMAPIProp. Many of the properties exposed by the CDO libraries are based on MAPI properties. The following table describes the mapping between these CDO library properties and the underlying MAPI properties.
| CDO library object |
Property |
MAPI property |
MAPI property type |
|---|---|---|---|
| AddressEntry | Address | PR_EMAIL_ADDRESS | PT_TSTRING |
| AddressEntry | DisplayType | PR_DISPLAY_TYPE | PT_LONG |
| AddressEntry | ID | PR_ENTRYID | PT_BINARY |
| AddressEntry | Name | PR_DISPLAY_NAME | PT_TSTRING |
| AddressEntry | Type | PR_ADDRTYPE | PT_TSTRING |
| AddressList | ID | PR_ENTRYID | PT_BINARY |
| AddressList | Name | PR_DISPLAY_NAME | PT_TSTRING |
| Attachment | Index | PR_ATTACH_NUM | PT_LONG |
| Attachment | Name | PR_ATTACH_ FILENAME |
PT_TSTRING |
| Attachment | Position | PR_RENDERING_ POSITION |
PT_LONG |
| Attachment | Source | PR_ATTACH_ PATHNAME |
PT_TSTRING |
| Attachment | Type | PR_ATTACH_ METHOD |
PT_LONG |
| Folder | FolderID | PR_PARENT_ ENTRYID |
PT_BINARY |
| Folder | ID | PR_ENTRYID | PT_BINARY |
| Folder | Name | PR_DISPLAY_NAME | PT_TSTRING |
| Folder | StoreID | PR_STORE_ENTRYID | PT_BINARY |
| InfoStore | ID | PR_ENTRYID | PT_BINARY |
| InfoStore | Name | PR_DISPLAY_NAME | PT_TSTRING |
| InfoStore | ProviderName | PR_PROVIDER_DISPLAY | PT_TSTRING |
| Message | Conversation | PR_CONVERSATION_ KEY |
PT_BINARY |
| Message | Conversation Index |
PR_CONVERSATION_ INDEX |
PT_BINARY |
| Message | Conversation Topic |
PR_CONVERSATION_ TOPIC |
PT_STRING |
| Message | Delivery Receipt |
PR_ORIGINATOR_ DELIVERY_REPORT_ REQUESTED |
PT_BOOLEAN |
| Message | Encrypted | PR_SECURITY | PT_LONG |
| Message | FolderID | PR_PARENT_ENTRYID | PT_BINARY |
| Message | ID | PR_ENTRYID | PT_BINARY |
| Message | Importance | PR_IMPORTANCE | PT_LONG |
| Message | ReadReceipt | PR_READ_RECEIPT_ REQUESTED |
PT_BOOLEAN |
| Message | Sender | PR_SENDER_ ENTRYID |
PT_BINARY |
| Message | Sent | PR_MESSAGE_FLAGS | PT_LONG |
| Message | Signed | PR_SECURITY | PT_LONG |
| Message | Size | PR_MESSAGE_SIZE | PT_LONG |
| Message | StoreID | PR_STORE_ENTRYID | PT_BINARY |
| Message | Subject | PR_SUBJECT | PT_TSTRING |
| Message | Submitted | PR_MESSAGE_FLAGS | PT_LONG |
| Message | Text | PR_BODY | PT_TSTRING |
| Message | Time Received |
PR_MESSAGE_ DELIVERY_TIME |
PT_SYSTIME |
| Message | TimeSent | PR_CLIENT_SUBMIT_ TIME |
PT_SYSTIME |
| Message | Type | PR_MESSAGE_CLASS | PT_TSTRING |
| Message | Unread | PR_MESSAGE_FLAGS | PT_LONG |
| Recipient | Address | combination of PR_ADDRTYPE and PR_EMAIL_ADDRESS | PT_TSTRING |
| Recipient | DisplayType | PR_DISPLAY_TYPE | PT_LONG |
| Recipient | Name | PR_DISPLAY_NAME | PT_TSTRING |
| Recipient | Type | PR_RECIPIENT_TYPE | PT_LONG |
| Session | Name | PR_DISPLAY_NAME | PT_TSTRING |
For more information about MAPI properties, see the MAPI Programmer's Reference.