Min version	Vista SP1	8 Pre RTM	8	8.1 Update 1
Max version	7 SP1		8.1 Update 1	10 TH2
x64 offset offset:bitpos	Field Name
0x0000	struct _HEAP_LOCAL_SEGMENT_INFO * LocalInfo
0x0008	volatile struct _HEAP_USERDATA_HEADER * UserBlocks		struct _HEAP_USERDATA_HEADER * UserBlocks
0x0010	struct _INTERLOCK_SEQ AggregateExchg	union _SLIST_HEADER DelayFreeList
0x0018	uint16_t BlockSize
0x0018	unsigned long[2] Alignment
0x001A	uint16_t Flags
0x001C	uint16_t BlockCount
0x001E	uint8_t SizeIndex
0x001F	uint8_t AffinityIndex
0x0020	struct _SINGLE_LIST_ENTRY SFreeListEntry	volatile struct _INTERLOCK_SEQ AggregateExchg
0x0024		uint16_t BlockSize	volatile uint16_t BlockSize
0x0024		unsigned long[2] Alignment
0x0026		uint16_t Flags
0x0028	volatile unsigned long Lock	uint16_t BlockCount
0x002A		uint8_t SizeIndex
0x002B		uint8_t AffinityIndex
0x002C				volatile unsigned long Lock
0x0030		struct _SINGLE_LIST_ENTRY SFreeListEntry
0x0038		volatile unsigned long Lock