Min version	8.1 Update 1	10 Pre RTM
Max version		10 TH2
x86 offset offset:bitpos	Field Name
0x0000	struct _LIST_ENTRY ListEntry	struct _LIST_ENTRY ListEntry
0x0000		struct _SINGLE_LIST_ENTRY Link
0x0008	struct _HEAP_LFH_SUBSEGMENT_OWNER * Owner
0x0008	union _HEAP_LFH_SUBSEGMENT_DELAY_FREE DelayFree
0x000C	struct _RTL_SRWLOCK BitmapLock	struct _RTL_SRWLOCK CommitLock
0x0010	struct _RTL_SRWLOCK CommitLock	uint16_t FreeCount
0x0010		volatile int16_t InterlockedShort
0x0010		volatile long InterlockedLong
0x0012		uint16_t BlockCount
0x0014	uint16_t FreeCount	uint16_t FreeHint
0x0014	volatile int16_t InterlockedShort
0x0014	volatile long InterlockedLong
0x0016	uint16_t BlockCount	uint8_t Location
0x0017		uint8_t Spare
0x0018	uint16_t FreeHint	struct _HEAP_LFH_SUBSEGMENT_ENCODED_OFFSETS BlockOffsets
0x001A	uint16_t BlockSize
0x001C	unsigned long CommitBitmap	uint8_t CommitUnitShift
0x001D		uint8_t CommitUnitCount
0x001E		uint16_t CommitStateOffset
0x0020	uint16_t FirstBlockOffset	unsigned long[1] BlockBitmap
0x0022	uint8_t Location
0x0023	volatile uint8_t DecommitInProgress
0x0024	unsigned long[1] AllocationBitmap