Help with wav files

[r i s h a b h s]

Dear All, this is a repost. I want to draw the still and running waveforms for a wavefile when its being played. Like its done in winamp. I have no idea how to go about it. I know the straucture of a wav file. can someone point me to a way how it can be done. This is important. Thanx and regards rIsHaBh