create a navigator from an action event

[schyst]

hi..im a just a new user of FLEX, maybe only a week, and i have this exercise
on creating a UI similar to explorer. a tree will be placed in the left side
and the window on the left. what i want is when i click an item in the tree, a
tab will appear in the left window. and then when another item is clicked, then
another tab will appear. i have this code on creating a button when a tree is
clicked:

import mx.controls.Button;
public var button1:Button;
public function treeClick():void {
button1 = new Button();
canvas1.addChild(button1);
}

<mx:Tree id="tree1" x="0" y="0" width="100%" showRoot="true"
labelField="@label" height="100%" click="treeClick()">

but when i change it to a TabNavigator, it won't work...and also, how can i
know what item in the tree is selected or clicked?

[ntsiii]

Declale the TabNavigator im mxml, empty, with an id, say "tn1".

Then create your content, which must be a container:
var vb1 = new VBox;
tn1.addChild(vb1);

When a node is clicked, the Tree dispatches a click event. A handler for this
event can reference the clicked node using event.target. Also, the
Tree.selectedItem will be a reference to the selected node.

Tracy