制作模拟钢琴的实例。程序执行后，创建一个带有模拟钢琴键盘的面板，用户可以通过键盘或者鼠标来“敲击”钢琴键盘发出声音，也可以通过电脑键盘的组合键实现钢琴的高音。-piano production simulation examples. After the procedures, the creation of a piano keyboard with the simulation panel, the user can mouse or keyboard to "percussion" sound from the piano keyboard, but also through a combination of computer keyboard keys to achieve the treble piano.