ComboBox Manually setting to a particular Item

Question

I have a ComboBox having the following Labels;
Label1
Label3
Label2
Label4
How to change the Label displayed in ComboBox from code. For example, Lets assume I have four button (Button1, Button2, ... ). On click of Button1, Label1 should be displayed in ComboBox, On click of button2, Label2 should be displayed in combobox and so on.

Answer 1

This code also shows how you can access the data field in the dataProvider.
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  <mx:Script>
    <![CDATA[
      import mx.collections.ArrayCollection;
      [Bindable] public var acTestHosts:ArrayCollection = new ArrayCollection([  
        {label:"Label1",data:1},
        {label:"Label2",data:2},
        {label:"Label3",data:3},
        {label:"Label4",data:4},
      private function clickFunc(event:MouseEvent):void{
        switch(event.currentTarget.label){
          case "Select Label1":
            cbx.selectedIndex = 0;
            break;
          case "Select Label2":
            cbx.selectedIndex = 1;
            break;
          case "Select Label3":
            cbx.selectedIndex = 2;
            break;
          case "Select Label4":
            cbx.selectedIndex = 3;
            break;
        txt.text = cbx.selectedItem.data;       
    ]]>
  </mx:Script>
  <mx:ComboBox id="cbx" dataProvider="{acTestHosts}"/>
  <mx:HBox>
    <mx:Button label="Select Label1" click="clickFunc(event);"/>
    <mx:Button label="Select Label2" click="clickFunc(event);"/>
    <mx:Button label="Select Label3" click="clickFunc(event);"/>
    <mx:Button label="Select Label4" click="clickFunc(event);"/>
  </mx:HBox>
  <mx:TextArea id="txt"/>
</mx:Application>