help with audio player

i'm trying to make mp3 player and need some help
first i want to know which tool is better to use

AxWindowsMediaPlayer1 or AxMMControl1

AXWindowsMediaPlayer

ok in the add button to add tracks to the playlist i have this code

vb Code:

For Each track As String In importdiag.FileNames
            playlist.Items.Add(track)
        Next

but it duplicated tracks if i select it agin i dont want it to duplicated tracks in the list