Min version	Vista SP1	7	7 SP1	8 Pre RTM	8	8.1	8.1 Update 1
Max version	Vista SP2	7 SP1				8.1 Update 1	10 TH2
x64 offset offset:bitpos	Field Name
0x0000	struct _RTL_CRITICAL_SECTION Lock		struct _RTL_SRWLOCK Lock	struct _RTL_SRWLOCK Lock
0x0000			struct _RTL_CRITICAL_SECTION padding
0x0008				struct _LIST_ENTRY SubSegmentZones
0x0018				void * Heap
0x0020				void * NextSegmentInfoArrayAddress
0x0028	struct _LIST_ENTRY SubSegmentZones			void * FirstUncommittedAddress
0x0030				void * ReservedAddressLimit
0x0038	uint64_t ZoneBlockSize			unsigned long SegmentCreate
0x003C				unsigned long SegmentDelete
0x0040	void * Heap			volatile unsigned long MinimumCacheDepth
0x0044				volatile unsigned long CacheShiftThreshold
0x0048	unsigned long SegmentChange			uint64_t SizeInCache		volatile uint64_t SizeInCache
0x004C	unsigned long SegmentCreate
0x0050	unsigned long SegmentInsertInFree			union _HEAP_BUCKET_RUN_INFO RunInfo	volatile union _HEAP_BUCKET_RUN_INFO RunInfo
0x0054	unsigned long SegmentDelete
0x0058	unsigned long CacheAllocs
0x005C	unsigned long CacheFrees
0x0060	struct _USER_MEMORY_CACHE_ENTRY[12] UserBlockCache	uint64_t SizeInCache		struct _USER_MEMORY_CACHE_ENTRY[12] UserBlockCache
0x0068		union _HEAP_BUCKET_RUN_INFO RunInfo
0x0070		struct _USER_MEMORY_CACHE_ENTRY[12] UserBlockCache
0x01E0	struct _HEAP_BUCKET[128] Buckets
0x01F0		struct _HEAP_BUCKET[128] Buckets
0x02A0				struct _HEAP_BUCKET[129] Buckets			struct _HEAP_LFH_MEM_POLICIES MemoryPolicies
0x02A4							struct _HEAP_BUCKET[129] Buckets
0x03E0	struct _HEAP_LOCAL_DATA[1] LocalData
0x03F0		struct _HEAP_LOCAL_DATA[1] LocalData
0x04A8				struct _HEAP_LOCAL_SEGMENT_INFO *[129] SegmentInfoArrays
0x08B0				struct _HEAP_LOCAL_SEGMENT_INFO *[129] AffinitizedInfoArrays
0x0CB8						struct _SEGMENT_HEAP * SegmentAllocator
0x0CC0				struct _HEAP_LOCAL_DATA[1] LocalData