Specifies the index number of the selected item in a ComboBox or ListBox control. Not available at design time; read/write at run time.
Control.ListIndex[ = nIndex]
The settings for the ListIndex property are:
(Default) Indicates no items selected. For a combo box, this means that the user has entered a value not in the list.
1 ... ListCountВ В В
The index of the selected item.
The following displays the string of the selected item.
You can return the same value by using the control's Value property.
Setting the MultiSelect property of a ListBox to .T. allows more than one item to be selected. In this case, the ListIndex will contain the index of the item that currently has the selection border.