Setting individual icons for different states on a Button control in Flash with ActionScript 3.0

// ActionScript 3.0
// Import the required component classes.
import fl.controls.Button;
import fl.controls.CheckBox;
 
/* Create a new Button component instance, set the various icon styles, and add 
   the button to the display list. */
var myButton:Button = new Button();
myButton.label = "icons";
myButton.enabled = true;
myButton.toggle = true;
myButton.setStyle("upIcon", BulletCheck);
myButton.setStyle("overIcon", BulletWarning);
myButton.setStyle("downIcon", BulletCritical);
myButton.setStyle("disabledIcon", IconCheck);
myButton.setStyle("selectedUpIcon", BulletCheckSelected);
myButton.setStyle("selectedOverIcon", BulletWarningSelected);
myButton.setStyle("selectedDownIcon", BulletCriticalSelected);
myButton.setStyle("selectedDisabledIcon", IconCheckSelected);
myButton.setSize(120, 40);
myButton.move(10, 10);
addChild(myButton);
 
/* Create a new CheckBox component instance, and add it to the display list. This button 
   will control whether or not the button instance is enabled. */
var enabledCheckBox:CheckBox = new CheckBox();
enabledCheckBox.label = "enabled";
enabledCheckBox.selected = myButton.enabled;
enabledCheckBox.move(10, 60);
enabledCheckBox.addEventListener(Event.CHANGE, enabledChangeHandler);
addChild(enabledCheckBox);
 
/* Create a new Button component instance, and add it to the display list. This button
   will control whether or not the button instance is toggled. */
var toggleCheckBox:CheckBox = new CheckBox();
toggleCheckBox.label = "toggle";
toggleCheckBox.selected = myButton.toggle;
toggleCheckBox.move(10, 80);
toggleCheckBox.addEventListener(Event.CHANGE, toggleChangeHandler);
addChild(toggleCheckBox);
 
/* Handler function for the enabled check box. This function gets called when the value
   of the enabledCheckBox is changed, and sets the button's enabled property based on 
   whether the enabledCheckBox instance is currently selected. */
function enabledChangeHandler(evt:Event):void {
    myButton.enabled = enabledCheckBox.selected;
}
 
/* Handler function for the toggle check box. This function gets called when the value
   of the toggleCheckBox is changed, and sets the button's toggle property based on 
   whether the toggleCheckBox instance is currently selected. */
function toggleChangeHandler(evt:Event):void {
    myButton.toggle = toggleCheckBox.selected;
}