在调试绘制位图的程序时，经常需要在代码运行到某一行时知道当前绘制的位图的具体内容，这套代码提供了一套方案，可以让你调试时实时观察到你的位图的内容变化，所见即所得，其中用到了进程间通信的技术-Have you ever debugged a graphics routine where you would really like to see what the images you are working with in memory actually looked like while you