Selecting item in a List or Tree component- without clicking

[timtoady]

I have a tree component called my_tree. I have a handler for reacting to the user clicking an item in the Tree that looks like this:

listenerObject = new Object();
listenerObject.change = function(eventObject){
   selectItem( my_tree.selectedIndices[0] );
}
my_tree.addEventListener("change", listenerObject)

Then selectIem() deals with whatever item the user has selected. But now what I'm trying to do is exactly the opposite-- I want to make an actionscript call that will select an item in the tree as though the user had selected it with the mouse.

I was barking up a tree that looked like this:

my_tree.selectedIndices[0];

though that obvoiusly that isn't right. Any advice?