| Min version | Vista | 8 Pre RTM | 8 Pre RTM | 8.1 Update 1 |
|---|---|---|---|---|
| Max version | 7 SP1 | 8 | 10 TH2 | |
| x86 offset offset:bitpos | Field Name | |||
| 0x0000 | struct _SINGLE_LIST_ENTRY SFreeListEntry | |||
| 0x0000 | struct _HEAP_SUBSEGMENT * SubSegment | |||
| 0x0004 | void * Reserved | |||
| 0x0008 | unsigned long SizeIndex | unsigned long SizeIndexAndPadding | ||
| 0x0008 | uint8_t SizeIndex | |||
| 0x0009 | uint8_t GuardPagePresent | |||
| 0x000A | uint16_t PaddingBytes | |||
| 0x000C | unsigned long Signature | |||
| 0x0010 | uint16_t FirstAllocationOffset | struct _HEAP_USERDATA_OFFSETS EncodedOffsets | ||
| 0x0012 | uint16_t BlockStride | |||
| 0x0014 | struct _RTL_BITMAP BusyBitmap | |||
| 0x001C | unsigned long[1] BitmapData | |||