Min version	8.1 Update 1	8.1	10 Pre RTM
Max version		8.1 Update 1	10 TH2
Architecture	x86	x64	x86	x64
x86 offset offset:bitpos	Field Name				x64 offset offset:bitpos
0x0000	struct _LIST_ENTRY ListEntry		struct _LIST_ENTRY ListEntry		0x0000
0x0000			struct _SINGLE_LIST_ENTRY Link	struct _SLIST_ENTRY Link	0x0000
0x0008	struct _HEAP_LFH_SUBSEGMENT_OWNER * Owner				0x0010
0x0008	union _HEAP_LFH_SUBSEGMENT_DELAY_FREE DelayFree				0x0010
0x000C	struct _RTL_SRWLOCK BitmapLock		struct _RTL_SRWLOCK CommitLock		0x0018
0x0010	struct _RTL_SRWLOCK CommitLock	struct _RTL_SRWLOCK CommitLock	uint16_t FreeCount		0x0020
0x0010			volatile int16_t InterlockedShort		0x0020
0x0010			volatile long InterlockedLong		0x0020
0x0012			uint16_t BlockCount		0x0022
0x0014			uint16_t FreeHint	uint16_t FreeHint	0x0024
0x0014	uint16_t FreeCount				0x0028
0x0014	volatile int16_t InterlockedShort				0x0028
0x0014	volatile long InterlockedLong	volatile long InterlockedLong			0x0028
0x0016			uint8_t Location	uint8_t Location	0x0026
0x0016	uint16_t BlockCount	uint16_t BlockCount			0x002A
0x0017			uint8_t Spare		0x0027
0x0018			struct _HEAP_LFH_SUBSEGMENT_ENCODED_OFFSETS BlockOffsets	struct _HEAP_LFH_SUBSEGMENT_ENCODED_OFFSETS BlockOffsets	0x0028
0x0018	uint16_t FreeHint				0x002C
0x001A	uint16_t BlockSize				0x002E
0x001C			uint8_t CommitUnitShift	uint8_t CommitUnitShift	0x002C
0x001C	unsigned long CommitBitmap	unsigned long CommitBitmap			0x0030
0x001D			uint8_t CommitUnitCount		0x002D
0x001E			uint16_t CommitStateOffset		0x002E
0x0020			uintptr_t[1] BlockBitmap		0x0030
0x0020	uint16_t FirstBlockOffset				0x0034
0x0022	uint8_t Location				0x0036
0x0023	volatile uint8_t DecommitInProgress				0x0037
0x0024	uintptr_t[1] AllocationBitmap				0x0038