WdfCollectionGetItem - NtDoc
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// wdfcollection.h
WDFOBJECT WdfCollectionGetItem(
[in] WDFCOLLECTION Collection,
[in] ULONG Index
);
View the official Windows Driver Kit DDI referenceNo description available.
[Applies to KMDF and UMDF]
The WdfCollectionGetItem method returns a handle to the object that is contained in a specified object collection and associated with a specified index value.
Collection [in]A handle to a collection object.
Index [in]A zero-based index value that identifies an object in the collection.
WdfCollectionGetItem returns a framework object handle, or NULL if the Index value is invalid.
A system bug check occurs if the driver supplies an invalid object handle.
Index values represent the order in which objects are added to a collection. An index value of zero represents the first object in the collection, an index value of one represents the second object, and so on, like a linked list. When the driver removes item i from a collection, item i+1 becomes item i.
For more information about object collections, see Framework Object Collections.
For a code example that uses WdfCollectionGetItem, see WdfCollectionGetCount.