| Appointment | Class Appointment. |
| Attachment | Class Attachment. |
| CalendarMessage | |
| Contact | Class Contact. |
| DistributionList | Class DistributionList. |
| Document | Class Document. |
| ExtendedProperty | Class ExtendedProperty. |
| ExtendedPropertyId | Class ExtendedPropertyId. |
| ExtendedPropertyList | |
| ExtendedPropertyName | Class ExtendedPropertyName. |
| ExtendedPropertyTag | Class ExtendedPropertyTag. |
| FileFormatException | The exception that is thrown when an input file or a data stream that is supposed to conform to a certain file format specification is malformed. |
| Folder | Class Folder. |
| Item | Class Item. |
| Journal | Class Journal. |
| MapiPropertyTag | |
| Message | |
| MessageStore | Class MessageStore. |
| Note | Class Note. |
| Post | |
| PropertyTag | |
| PstFile | Class PstFile. |
| Recipient | Class Recipient. |
| ReportMessage | Class ReportMessage. |
| Table | Class Table. |
| TableEntry | Class TableEntry. |
| TableEntryList | Class TableEntryList. |
| Task | Class Task. |
| TaskRequest | Class TaskRequest. |
| AttachmentFlags | |
| AttachmentMethod | |
| BusyStatus | Specifies whether the attendee is busy at the time of an appointment on their calendar. The specified status appears in the free/busy view of the calendar. |
| DisplayType | |
| EncryptionType | |
| FlagIcon | |
| FlagStatus | |
| Gender | |
| Importance | |
| LastVerbExecuted | |
| MeetingStatus | The MeetingStatus enum specifies the status of an appointment or meeting. |
| MessageFlag | |
| NoteColor | |
| ObjectType | |
| Priority | Enum Priority |
| PropertyType | |
| RecipientType | |
| RecurrenceType | |
| ResponseStatus | Enum ResponseStatus |
| SelectedMailingAddress | Enum SelectedMailingAddress |
| Sensitivity | Enum Sensitivity |
| TaskDelegationState | Represents the status types of a delegated task |
| TaskOwnership | Indicates the ownership state of the task. |
| TaskStatus | Identifies the status types of a task item. |