How to develop an audio converter interface

[Danish Gul Khan]

I have deceloped an audio converter interface. But I don't know how to convert the audio formats. I have downloaded 3 DLLs including:

lame_enc.dll,
libsndfile.dll and
madlldlib.dll.

I got them while searching for the solution. Kindly help me with the whole process. What should I do ???

I want to make the converter in vb.net...please help me out