Please help!!!! - How to create a event.DirectAudioPlayback

Hello.I have a really BIG problem.I have tried to create a event in my application.
I use DirectX.AudioPlayback to play mp3 files but I wan't to now when the file is finished.....to play the next one.But how.I use VC# 2005.Please help me.
ps: backmusic = new audio(file);
I have tried with:
private void backmusic_Ending(object sender,EventHandler e)
{
MessageBox.Show("The file has finished");
}

PS: Sorry for the gramatical mistakes.I don't know very good english.THANKS

[521 byte] By [johnny_no1_boy] at [2007-12-23]