Recording a conversation and saving it in .wav file

Hi,

I am trying to record a conversation into a file using .wav format.If possible can u plz specify which headers should i use and in which format should i write the file.I am using socket programming using C and using the VC++ environment.I tried using the save my sound command but did not understand how to go abt in doing this.I want to save the file on the hard disk.Waiting for an early reply.

Thanks,
Riz