i am primarily using my website for people to downlaod my music ive made.how can i make it so users can preview songs before they download. also how do i make it so windows media player is visible on my page and playing my song so users can stop and pause music.

Just how exactly do you figure that should happen?
Never mind quibbles like you cannot "view" music, I assume you mean "hear". But how can you hear music you haven't downloaded?

The only sort of answer I could think of that makes sense in the real world is that if you have a 3 mb mp3 file, you could also offer a 20 kb midi version so that people could find out if they like the tune. Still requires a download, of course, but....