3.33.4 Message Processing Events and Sequencing Rules

To retrieve an IUpdateHistoryEntry instance, a client MUST call the IUpdateHistoryEntryCollection::Item (opnum 8) (section 3.34.4.1) method.

To retrieve an IUpdateHistoryEntry2 instance, a client MUST first retrieve an IUpdateHistoryEntry interface and then call the IUnknown::QueryInterface method to obtain an IUpdateHistoryEntry2 interface.