The following structures are used by clients and service providers and contain an entry identifier or an array of entry identifiers representing MAPI objects, properties, or service providers. Two of these structures, FLATMTSIDLIST and MTSID, contain X.400 message transport system (MTS) identifiers.
ENTRYID
ENTRYLIST
FLATENTRY
FLATENTRYLIST
FLATMTSIDLIST
GUID
IID
MAPINAMEID
MAPIUID
MTSID