typedef struct _HEAP_LIST_LOOKUP
{
    HEAP_LIST_LOOKUP *ExtendedLookup;
    unsigned long ArraySize;
    unsigned long ExtraItem;
    unsigned long ItemCount;
    unsigned long OutOfRangeItems;
    unsigned long BaseIndex;
    LIST_ENTRY *ListHead;
    unsigned long *ListsInUseUlong;
    LIST_ENTRY **ListHints;
} HEAP_LIST_LOOKUP, *PHEAP_LIST_LOOKUP;