Shoutbox

Ok I've been going at this for about an hour now and it's driveing me nuts. So I'll ask here.

I want to be able to search text on a selected listview item and if that text contains .mp3 then do bla bla. So this is what I got so far

If listFiles2.SelectedItems(0).Text = ".mp3" then
Bla bla bla

Now I know this will not work because thats saying that the text in the selected item is .mp3 then do bla bla bla, but what I really want is it to say If selected item text has .mp3 in it then do bla bla bla.