my_mc.onRelease = function():Void {};
var dataList:Array = new Array();
dataList.push({label: "item1", data: 1});
dataList.push({label: "item2", data: 2});
dataList.push({label: "item3", data: 3});
my_cb.dataProvider = dataList;

my_txt.setStyle("themeColor", "haloBlue");
my_cb.setStyle("themeColor", "haloBlue");

my_txt.tabIndex = 1;
my_mc.tabIndex = 2;
my_cb.tabIndex = 3;

var cbListener:Object = new Object();
cbListener.keyDown = function(evt:Object):Void {
	if (evt.target == evt.target.getFocus()) {
		if (evt.code == 38 || evt.code == 40) {
			evt.target.open();
		}
	}
};
my_cb.addEventListener("keyDown", cbListener);