OID Instead of EntryID (Windows CE 5.0)
An item's object identifier (OID) uniquely identifies that item. It can be obtained by looking at the OID property. The main Application object supports GetItemFromOid, which accesses an item, given its OID.
You should not cache the OID from an item as you would an entry identifier. OIDs can change if the device is backed up and restored. If you must cache these items, you should have a daemon program that runs after a restore is completed and resets these values.
See Also
Differences Between the Windows CE and Desktop Models | Pocket Outlook Object Model Application Development
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