directx show 的帮助文档是一个很好的参考资料。可是里面的很多东西都讲得太多了，而我们在开始接触的时候，都想从最简单的东西入手，然后逐渐深入，可是参考SDK里面的例子程序，总是云里雾里，特别是自己动手写FILTER，要拨开它的丛丛雾水，还真有些不容易。 -DirectX show with the help documentation is a good reference. But there are a lot of things they said too much, and we start contact, the most wanted from the start with simple things, and then gradually deepening, but inside the SDK reference examples procedures, always waves, especially to write himself FILTER, it is supposed to touch the fog, it really these will not be easy.