HELP !! Highlighting List Items on click

Hi,
I have a question on ListView Box. I am popoulating it with listitems and I have a command button which is enabled when you click on a list Item. My problem is when you click anywhere on the list box an item gets higlighted, which I don't want. How can I get rid of this problem and make sure that the items get higlighted only when it's clicked on a List Item only ?

Thank for the help

Viji