一个简单的屏保程序，使用VC＋MFC编写，有兴趣的可以看看哦，非常简单。就是一层纸，捅破它吧。-A simple screen saver, use the VC MFC prepared, interested can see Oh, very simple. Is a layer of paper, pierce it right.

屏幕截图：建立一个屏幕的设备上下文，根据屏幕上下文创建一个内存位置，最后将内存位图数据读入到文件实现屏幕截图操作。-Screenshots: set up a screen device context, according to the context of the screen to create a memory location, and finally the memory bitmap data into the docum