>I need a very flexible OCX that allows me to play MP3, to import or to export lists of songs, like for a radio station. Could somebody guide?

I've done some extensive stuff in this area. Your best bet is to get the Windows Media Encoder SDK and use it.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmencode/htm/windowsmediaencoderautomation.asp

There is a programming guide & everything on that web page too. I've found it to be the most flexable - and it's free.