listbox row selected

I've being trying to work out a problem i've being having for a while now and i'm not sure if i'm over complicating it.

When a form loads, it uses a for next loop to load an array of peoples names into a list box. However i want to extract the persons ID once their name has being clicked. I can make this work by using another for next loop until the selected name matches the an array number. However it fails if there are two people of the same name.

Is there a command or piece of code that can extract the row number of the item selected?

This problem has being bugging me for weeks now and any help would be much appreciated.

ListBox.SelectedIndex Property

Aah i think i misused this when i tried it the first time. Thanks ever so much, finally fixed that little use.

Another option would be to use databinding. If you were to have a datatable with the name and id, you could bind the listbox to the table and set the DisplayItem to the name and the ValueItem to the ID. Then you could get either part from the listbox. However, it sounds like you have two distinct arrays for the two pieces, in which case you can't bind to both.