利用DirectSound从麦克风获取声音，以WAV格式存储至计算机的硬盘，并利用Graphics类显示声音文件的波形。-Catch sound from cumputer s microphone.Store it as WAV in the HDD off the computer. Draw waveform of the WAV file by using Graphics.

三维显示的计算机模拟物理程序。DirectX显示。可在两种模拟方式中切换。-Three-dimensional computer simulation of physical processes show. DirectX display. Available in both analog switch.