Finding Header Information
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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.
Defines status codes for error values.
Defines macros for debugging.
Defines frequently used event types, property types, flags, structures, and interfaces.
Defines forms elements.
Defines flags and interfaces that MAPI implements for service providers and message services.
Defines property tags.
Defines utility interfaces and functions.
Defines validation macros.
Defines flags and interfaces that MAPI implements for clients.
Defines additional properties and interfaces offered by Microsoft Exchange Information Store.