The IMAPISupport::WrapStoreEntryID method converts a message store's internal entry identifier to an entry identifier in the MAPI standard format.
HRESULT WrapStoreEntryID(
ULONG cbOrigEntry,
LPENTRYID lpOrigEntry,
ULONG FAR * lpcbWrappedEntry,
LPENTRYID FAR * lppWrappedEntry
);
The IMAPISupport::WrapStoreEntryID method is implemented for all service provider support objects. Service providers use WrapStoreEntryID to have MAPI generate an entry identifier for a message store that wraps the store's internal entry identifier.
When a client calls your message store's IMAPIProp::GetProps method to retrieve its PR_STORE_ENTRYID property and your message store uses an entry identifier in a private format, call WrapStoreEntryID and return the entry identifier pointed to by lppWrappedEntry.
Calls to the IMSProvider::Logon and IMSLogon::CompareEntryIDs methods always obtain the store's private entry identifier; the wrapped version is used only between client applications and MAPI.
Free the memory for the entry identifier pointed to by the lppWrappedEntry parameter using the MAPIFreeBuffer function when you have finished using it.
IMAPIProp::GetProps, IMAPISupport::CompareEntryIDs, IMSLogon::CompareEntryIDs, IMSProvider::Logon, MAPIFreeBuffer