这是一个用vb编写的倒计时程序，文件必须放在c：下，不然声音无法播放，当然你可以修改源程序路径！该程序可以作为比赛限时用，演讲限时等-vb prepared with the countdown procedures, documents must be placed on c :, otherwise unable to broadcast voice, of course, you can modify the source path! The program can be used as

使用VB打开用于摄像头视频采集，截图，选择路径后保存功能-Using VB to open for the camera video capture, capture, select the path save function

参考API函数，打开并播放MP3格式的音乐文件。可以暂停，停止。自由选取文件路径。-See the API function to open and play music files in MP3 format. You can pause, stop. Freedom to choose the file path.