又一个游戏编程基础的例子，对初学游戏编程很有参考价值。这个例子是图形的运动，其实就是个不断重画的过程。需要一点VC编程的基础。-Another example of game-based programming, game programming for beginners valuable. This example is the movement of graphics, in fact, is a constant re-drawing process. Need a little pro