Min version	8.1 Update 1	10 Pre RTM	10 Pre RTM	10 TH2
Max version			10
x86 offset offset:bitpos	Field Name
0x0000	volatile unsigned long TotalReservedPages
0x0004	volatile unsigned long TotalCommittedPages
0x0008	unsigned long Signature
0x000C	unsigned long GlobalFlags
0x0010	uint16_t ProcessHeapListIndex	unsigned long FreeCommittedPages
0x0014	unsigned long FreeCommittedPages	unsigned long Interceptor
0x0018	struct _RTL_SRWLOCK LargeMetadataLock	uint16_t ProcessHeapListIndex
0x001A		uint16_t GlobalLockCount
0x001C	struct _RTL_RB_TREE LargeAllocMetadata	unsigned long GlobalLockOwner
0x0020		struct _RTL_SRWLOCK LargeMetadataLock
0x0024	volatile unsigned long LargeReservedPages	struct _RTL_RB_TREE LargeAllocMetadata
0x0028	volatile unsigned long LargeCommittedPages
0x002C	struct _HEAP_LOCK SegmentAllocatorLock	volatile unsigned long LargeReservedPages
0x0030		volatile unsigned long LargeCommittedPages
0x0034		struct _HEAP_LOCK SegmentAllocatorLock	struct _RTL_SRWLOCK SegmentAllocatorLock
0x0038			struct _LIST_ENTRY SegmentListHead
0x0040			unsigned long SegmentCount
0x0044	struct _LIST_ENTRY SegmentListHead		struct _RTL_RB_TREE FreePageRanges
0x004C	unsigned long SegmentCount	struct _LIST_ENTRY SegmentListHead	unsigned long VirtualizationKey	struct _RTL_SRWLOCK ContextExtendLock
0x0050	struct _RTL_RB_TREE FreePageRanges		struct _RTL_SRWLOCK ContextExtendLock	uint8_t * AllocatedBase
0x0054		unsigned long SegmentCount	uint8_t * AllocatedBase	uint8_t * UncommittedBase
0x0058	void * NextLocalInfoAddress	struct _RTL_RB_TREE FreePageRanges	uint8_t * UncommittedBase	uint8_t * ReservedLimit
0x005C	void * NextUncommitedAddress		uint8_t * ReservedLimit	struct _HEAP_VS_CONTEXT VsContext
0x0060	void * ReservedLimit	struct _RTL_SRWLOCK ContextExtendLock	struct _HEAP_VS_CONTEXT VsContext
0x0064	struct _HEAP_LFH_CONTEXT LfhContext	uint8_t * AllocatedBase
0x0068		uint8_t * UncommittedBase
0x006C		uint8_t * ReservedLimit
0x0070		struct _HEAP_VS_CONTEXT VsContext
0x0090				struct _HEAP_LFH_CONTEXT LfhContext
0x0098			struct _HEAP_LFH_CONTEXT LfhContext
0x00A8		struct _HEAP_LFH_CONTEXT LfhContext