The ALICE artificial intelligence engine. Here is the source in VB.NET. Just type in a question and she answers in speech. Works in XP or Vista.

portaudio 的声音录音和插入的源码，源码里有稍些的问题，已经修改通过，频率是16-the source code of capturing the audio and play,there aer some question,but they are done ,the frequence is 16000