List Box Properties

Hai,
I am using List Box to display the Countires, States and Cities. Can some one tell me which property can determine the Index of the selected value. So that i can fill up the other list box.SelectedIndex
But come to think of it, you can also use the .SelectedValue of the combobox.
But come to think of it, you can also use the .SelectedValue of the combobox.
Thanks Buddy it helped me