struct EX_WORK_QUEUE

typedef struct _EX_WORK_QUEUE
{
     KQUEUE WorkerQueue;
     ULONG DynamicThreadCount;
     ULONG WorkItemsProcessed;
     ULONG WorkItemsProcessedLastPass;
     ULONG QueueDepthLastPass;
     EX_QUEUE_WORKER_INFO Info;
} EX_WORK_QUEUE, *PEX_WORK_QUEUE;

Windows Vista Kernel Structures