How to convert wav to mp3 from an exe that I have created?

I am a newbie in VB and programming. I created an exe that allows to record, play and save user's speech onto his computer. The file is saved as wav. I wonder is it possible to convert the files to mp3 format when user clicks on Save button? I use VB6 to create the MCI and currently stucked in the convertion of wav to mp3. I would be very glad if someone could share the knowledge and expertise in this area with me. If necessary, I can send a copy of the record/playback exe that I created. Looking forward to some replies soon. Thanks in advance, Janice ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows 9*/XP/2000/NT all 3.0+ versions of IE