模拟键盘鼠标的dll类代码，支持前台和后台，还有延时函数，不同于sleep不会造成无法响应，绝对值得一看，里面有很多技巧的东西-Simulate keyboard and mouse of dll class code, support foreground and background, as well as time delay function, different from the sleep will not cause no response, the absolute worth,