列举摄像头，并捕捉视频，可以放大视频，且可以抓拍图片。改造别人的类CCaptureVideo，使用很方便。-List camera and capture video, you can enlarge the video, and can capture images. Transformation of people' s class CCaptureVideo, very easy to use.

仅仅使用了vfw简单开发视频扑捉，但毕竟vfw几乎淘汰，所以里面很多功能很难实现，如图片放大缩小，如压缩，如与硬件设备关联，以及图片深度难修改等等，我建议用direct show-Vfw only used to develop a simple video扑捉, but almost vfw out, so it is very difficult to achieve a lot of features, such as image zoom, such as compression, su