这是一个有趣的程序，采用VC++编写，他可以利用PC电脑蜂鸣器发出声音，模拟电子琴-This is an interesting program, written by VC++, he can use the PC computer buzzer sounds, analog keyboard

通过程序播放声音，对于有声音报警功能的系统非常有用。通过程序能实现声音报警。-Through the program play sound, for a sound alarm system is very useful. Through the program to achieve sound alarm.