Assigning event to items in listbox

Hi
I am working on this assignment and have most of it done. I cannot figure out how to get one message to diplay at a time.

Create a form with a listbox that list at least four sports teams of your choice.  When the user places  the mouse over the listbox, display a label that contains single-game ticket prioce for each team. The label disappears when the user's mouse leaves the listbox area. When the user clicks a team name in the listbox display another label that contains the correct ticket price. Also change the BackColor of the form to the selected team's color.
Thanks!