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Returns a pointer to the beginning of the collection of IUnknown interface pointers.

IUnknown** begin( );

A pointer to an IUnknown interface pointer.

The collection contains pointers to interfaces stored locally as IUnknown. You cast each IUnknown interface to the real interface type and then call through it. You do not need to query for the interface first.

Before using the IUnknown interface, you should check that it is not NULL.