| Min version | XP SP2 | Vista | 8 Pre RTM | 8.1 Update 1 | 10 Pre RTM |
|---|---|---|---|---|---|
| Max version | XP SP3 | 7 SP1 | 8 | 10 TH2 | |
| x86 offset offset:bitpos | Field Name | ||||
| 0x0000 | uint16_t Size | struct _HEAP_ENTRY HeapEntry | |||
| 0x0000 | void * volatile SubSegmentCode | void * volatile SubSegmentCode | unsigned long SubSegmentCode | struct _HEAP_UNPACKED_ENTRY UnpackedEntry | |
| 0x0000 | uint16_t FunctionIndex | uint16_t Size | |||
| 0x0000 | unsigned long InterceptorValue | unsigned long SubSegmentCode | |||
| 0x0000 | unsigned long Code1 | struct _HEAP_EXTENDED_ENTRY ExtendedEntry | |||
| 0x0000 | uint64_t AgregateCode | uint16_t FunctionIndex | |||
| 0x0000 | unsigned long InterceptorValue | ||||
| 0x0000 | unsigned long Code1 | ||||
| 0x0000 | uint64_t AgregateCode | ||||
| 0x0002 | uint16_t PreviousSize | uint8_t Flags | |||
| 0x0002 | uint16_t ContextValue | ||||
| 0x0003 | uint8_t SmallTagIndex | ||||
| 0x0004 | uint8_t SmallTagIndex | uint16_t PreviousSize | |||
| 0x0004 | uint16_t UnusedBytesLength | ||||
| 0x0004 | uint16_t Code2 | uint16_t Code2 | |||
| 0x0004 | unsigned long Code234 | ||||
| 0x0005 | uint8_t Flags | ||||
| 0x0006 | uint8_t UnusedBytes | uint8_t SegmentOffset | |||
| 0x0006 | uint8_t LFHFlags | ||||
| 0x0006 | uint8_t EntryOffset | ||||
| 0x0006 | uint8_t Code3 | ||||
| 0x0007 | volatile uint8_t SegmentIndex | uint8_t UnusedBytes | |||
| 0x0007 | uint8_t ExtendedBlockSignature | ||||
| 0x0007 | uint8_t Code4 | ||||
| 0x0008 | struct _LIST_ENTRY FreeList | ||||