def __init__(self):
        vstruct.VStruct.__init__(self)
        self.Size = v_uint16()
        self.Flags = v_uint8()
        self.SmallTagIndex = v_uint8()
        self.PreviousSize = v_uint16()
        self.SegmentOffset = v_uint8()
        self.UnusedBytes = v_uint8()
        self.FreeList = LIST_ENTRY()