How to select a file from a local disk dinamically?

Hi. I want to do a stand alone application in wich you can select a mp3 from local disk with Flash MX
I’ve been searching for a function or a method who allows to open a “browser window” or to have a string with the filenames but I haven’t find nothing. I also have searched for an argument for fscommand but nothing.

Does someone know if some function exists in javascript to give a string with the filenames of a folder? And in this case, how to integrate it in actionscript?

I know that I can use a explorer to do that with javascript, but I need to do it without browsers.

Thanks!