Min version	Vista	7	7 SP1	8 Pre RTM	8 Pre RTM	8.1 Update 1	8.1 Update 1
Max version	Vista SP2	7 SP1			8		10 TH2
x86 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
0x0004				struct _LIST_ENTRY SubSegmentZones
0x000C				void * Heap
0x0010				void * NextSegmentInfoArrayAddress
0x0014				void * FirstUncommittedAddress
0x0018	struct _LIST_ENTRY SubSegmentZones			void * ReservedAddressLimit
0x001C				unsigned long SegmentCreate
0x0020	unsigned long ZoneBlockSize			unsigned long SegmentDelete
0x0024	void * Heap			volatile unsigned long MinimumCacheDepth
0x0028	unsigned long SegmentChange			volatile unsigned long CacheShiftThreshold
0x002C	unsigned long SegmentCreate			unsigned long SizeInCache		volatile unsigned long SizeInCache
0x0030	unsigned long SegmentInsertInFree			union _HEAP_BUCKET_RUN_INFO RunInfo	volatile union _HEAP_BUCKET_RUN_INFO RunInfo
0x0034	unsigned long SegmentDelete
0x0038	unsigned long CacheAllocs			struct _USER_MEMORY_CACHE_ENTRY[12] UserBlockCache
0x003C	unsigned long CacheFrees
0x0040	struct _USER_MEMORY_CACHE_ENTRY[12] UserBlockCache	unsigned long SizeInCache
0x0048		union _HEAP_BUCKET_RUN_INFO RunInfo
0x0050		struct _USER_MEMORY_CACHE_ENTRY[12] UserBlockCache
0x0100	struct _HEAP_BUCKET[128] Buckets
0x0110		struct _HEAP_BUCKET[128] Buckets
0x01B8				struct _HEAP_BUCKET[129] Buckets			struct _HEAP_LFH_MEM_POLICIES MemoryPolicies
0x01BC							struct _HEAP_BUCKET[129] Buckets
0x0300	struct _HEAP_LOCAL_DATA[1] LocalData
0x0310		struct _HEAP_LOCAL_DATA[1] LocalData
0x03BC				struct _HEAP_LOCAL_SEGMENT_INFO *[129] SegmentInfoArrays
0x03C0							struct _HEAP_LOCAL_SEGMENT_INFO *[129] SegmentInfoArrays
0x05C0				struct _HEAP_LOCAL_SEGMENT_INFO *[129] AffinitizedInfoArrays
0x05C4							struct _HEAP_LOCAL_SEGMENT_INFO *[129] AffinitizedInfoArrays
0x07C4						struct _SEGMENT_HEAP * SegmentAllocator
0x07C8				struct _HEAP_LOCAL_DATA[1] LocalData			struct _SEGMENT_HEAP * SegmentAllocator
0x07D0							struct _HEAP_LOCAL_DATA[1] LocalData