Selecting with Listview

If I have a listview with 10 rows (items) listed in it, with an image on every row, and 4 columns across, how can I get the item number when the user clicks on any column or image. For example, if listview has columns named
field 1, field 2, field 3, and field 4, and they double click the field 4, the 3rd row from the top, I want to know that item[2] was chosen (starts at 0, so the 3rd row is item[2]).  In other words I'm trying to determine what row the user clicked no matter where he clicks.

         Thanks