此源码主要是实现每按一定时间戳截取全屏的功能，并将其自动保存为bmp格式图片存储在当前目录下-This source is mainly achieved by a certain time-stamp for every interception full-screen functions, and its automatic save it as bmp format pictures stored in the current directory

实现屏幕截图功能,一个初学者必需会的东西-ScreenCapture