22.1.创建一个运行时共享库

<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="300" height="200">
<mx:Metadata>
[Event(name="submit", type="flash.events.Event")]
</mx:Metadata>
<mx:Script>
<![CDATA[
public static const SUBMIT:String = "submit" ;
private function clickHandler():void {
dispatchEvent( new Event( CustomEntryForm.SUBMIT ) );
}
public function get firstName():String { return firstNameField.text; }
public function get lastName():String { return lastNameField.text; }

]]>
</mx:Script>
<mx:Form>
<mx:FormItem label="First Name:">
<mx:TextInput id="firstNameField" />
</mx:FormItem>
<mx:FormItem label="Last Name:">
<mx:TextInput id="lastNameField" />
</mx:FormItem>
<mx:Button label="submit" click="clickHandler();" />
</mx:Form>
</mx:Canvas>