ActionScript 2.0 Components Language Reference 
ActionScript 2.0 Components Language Reference |
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Flash Player 6 (6.0.79.0).
Flash MX 2004.
comboBoxInstance.selectedIndex
Property; the index number of the selected item in the drop-down list. The default value is 0. Assigning this property clears the current selection, selects the indicated item, and displays the label of that item in the combo box's text box.
If you assign an out-of-range value to this property, Flash ignores it. Entering text into the text field of an editable combo box sets selectedIndex to undefined.
With a ComboBox component instance my_cb, the following code selects the last item in the list (otherwise, by default it would display the first item):
// Add Items to List.
my_cb.addItem({data:1, label:"First Item"});
my_cb.addItem({data:2, label:"Second Item"});
my_cb.addItem({data:3, label:"Third Item"});
my_cb.addItem({data:4, label:"Fourth Item"});
// Select last item on the list.
my_cb.selectedIndex = my_cb.length-1;
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