在VISUAL STDIO 2008下用C#编程来调用DTMF解码的DLL文件.通过将含有DTMF信息的音频数据流进行解码来识别对应按键的位置-In VISUAL STDIO 2008 using C# Programmed to call the DLL file DTMF decoder. By containing DTMF information to decode the audio data stream to identify the location of the corresp