CheckBox  - AS3 Flex

<?xml version="1.0"?>
<!-- Simple example to demonstrate the Halo CheckBox control -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/mx">

    <fx:Script>
        <![CDATA[
            import mx.controls.Alert;

            // This event handler adds and deletes items from the shopping cart.
            private function modifyCart():void {
                cartItems.text = "";

                if(milkCB.selected) {
                    cartItems.text += "milk" + "\n";
                }

                if(eggsCB.selected) {
                    cartItems.text += "eggs" + "\n";
                }

                if(breadCB.selected) { 
                    cartItems.text +="bread" + "\n";
                }
            }

           // This event handler opens the Halo Alert control.
           private function sendMessage():void {
                if(couponCB.selected) {
                    Alert.show("You will receive coupons.");
                } else {
                    Alert.show("You will not receive any coupons.");
                }
           }
        ]]>
    </fx:Script>

    <s:Panel title="Halo CheckBox Control Example" 
            width="75%" height="75%"
            horizontalCenter="0" verticalCenter="0">
        <s:HGroup left="10" right="10" top="10" bottom="10">
            <s:VGroup>
                <mx:CheckBox id="milkCB" label="milk" click="modifyCart();"/>
                <mx:CheckBox id="eggsCB" label="eggs" click="modifyCart();"/>
                <mx:CheckBox id="breadCB" label="bread" click="modifyCart();"/>
            </s:VGroup>

            <s:VGroup>
                <s:Label text="Items in my cart "/>
                <s:TextArea id="cartItems" width="300" height="50" verticalScrollPolicy="off"/>
                <!-- Event handler sendMessages() is used to handle event click -->
                <mx:CheckBox id="couponCB" label="Send me coupons for items in my cart"
                        click="sendMessage();" selected="true" color="blue"/>
            </s:VGroup>
        </s:HGroup>
    </s:Panel>

</s:Application>