HANDLE			hAdapterHandle;
	ULONG			Oid;
 	ULONG			Length;
 	UCHAR			Data[1];

The adapter’s handle value for set/query operation.

This is a numeric identifier that indicates the type of query/set function to perform on the adapter through the PacketRequest function. Possible values are defined in the ntddndis.h include file. It can be used, for example, to retrieve the status of the error counters on the adapter, its MAC address, the list of the multicast groups defined on it, and so on.

This field indicates the length of the Data field.

This field contains the information passed to or received from the adapter.