Wineskin: Don't quit on close

I made a wineskin app in Mac. But when I hit the red close button it quits the app, rather than hiding it like other mac apps. Can this behaviour be changed?

I installed Foobar in mac using Wineskin. When I hit the red close button, I would like the windows to hide, rather than quitting Foobar, so the music continues to play.

Thanks a lot!