def __init__(self):
        vstruct.VStruct.__init__(self)
        self.Magic = v_uint32()
        self.Count = v_uint32()
        self.Size = v_uint32()
        self.UserCount = v_uint32()
        self.UserSize = v_uint32()
        self.UserContext = v_ptr32()
        self.Next = v_ptr32()
        self.Trace = v_ptr32()