def __init__(self):
        vstruct.VStruct.__init__(self)
        self.StartStamp = v_uint32()
        self.Heap = v_ptr32()
        self.RequestedSize = v_uint32()
        self.ActualSize = v_uint32()
        self.FreeQueue = LIST_ENTRY()
        self.StackTrace = v_ptr32()
        self.EndStamp = v_uint32()