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