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.

里面包括我的英文论文和程序以及matlab截图，还有程序使用的声音源文件-Inside, including my English papers and procedures, as well as matlab shots, have to use the voice of the source file