Visual Basic Reference
A ListBox control displays a list of items from which the user can select one or more. If the number of items exceeds the number that can be displayed, a scroll bar is automatically added to the ListBox control.
If no item is selected, the ListIndex property value is -1. The first item in the list is ListIndex 0, and the value of the ListCount property is always one more than the largest ListIndex value.
To add or delete items in a ListBox control, use the AddItem or RemoveItem method. Set the List, ListCount, and ListIndex properties to enable a user to access items in the ListBox. Alternatively, you can add items to the list by using the List property at design time.