Commonly Used Header Files
Applies to: Outlook 2013 | Outlook 2016
Each reference topic includes a table that names the MAPI header file where the API element is defined. The following table describes the MAPI header files that developers frequently use.
| Header file | Description |
|---|---|
| Mapi.h |
Defines structures and constants. |
| Mapiaux.h |
Defines additional interfaces, structures, and constants used by the Messaging Applications Programming Interface. |
| Mapicode.h |
Defines status codes for error values. |
| Mapidbg.h |
Defines macros for debugging. |
| Mapidefs.h |
Defines frequently used event types, property types, flags, structures, and interfaces. |
| Mapiform.h |
Defines forms elements. |
| Mapiguid.h |
Defines GUIDs. |
| Mapinis.h |
Defines utilities that support internationalization. |
| Mapioid.h |
Defines MAPI object identifiers. |
| Mapispi.h |
Defines flags and interfaces that MAPI implements for service providers and message services. |
| Mapitags.h |
Defines property tags. |
| Mapiutil.h |
Defines utility interfaces and functions. |
| Mapival.h |
Defines validation macros. |
| Mapiwin.h |
Defines types, constants, flags, functions, and macros for developing single-source service providers. |
| Mapiwz.h |
Defines prototypes and constants for the provider wizard. |
| Mapix.h |
Defines flags and interfaces that MAPI implements for clients. |
| Mspst.h |
Defines properties of the personal information store (.pst file). |
For information about how to obtain MAPI header files, see Install MAPI Header Files.