How to capture sound in brew os

Hi,

I am developing application of guitar tuner software to play the guitar in real time.

My requirement is while we are talking or playing something our application should capture that sound and play again. This program i have to implement for brew os using vc++. Brew os supports mobile applications.

How can i start coding to capture sound ? In which format it stores? Is there any related API's supports for this? Is there any related tutorials and urls related to capture sound?

Plz give ur valuable views regarding this.

thank u,
regards,
varu