About the MAPI-MIME Conversion API [Outlook 2003 API Reference]
Office 2003
The MAPI-MIME Conversion API allows mail providers to convert between MIME objects and MAPI messages. It provides constant definitions, class identifiers, and interface identifiers as shown in Constants for the MAPI-MIME Conversion API. Mail providers must cocreate an instance of IConverterSession by calling the CoCreateInstance function.
