Entry Identifier Functions

The following functions manipulate entry identifiers and message identifiers:

HrComposeEID
HrComposeMsgID
HrDecomposeEID
HrDecomposeMsgID
HrEntryIDFromSz
HrSzFromEntryID
WrapStoreEntryID

Note Except for WrapStoreEntryID, these functions may not be supported in future versions of MAPI.