Flash Builder 4 How to create a add button to add instance of textbox and combobox?

I have tried to work on a simple form with Flash Builder 4, but was stuck in creating the dynamic addition of the instance for a textbox and comb开发者_高级运维obox within a Hbox.

I have created an HBox component with a textbox and a combo box. I then create a button Add new Row, to add a new row of Hbox on the runtime.

May I know how can I create the add to make it able to add new hbox component on clicking of the button, such that when i click the hbox 3 times, I should have 3 rows of the component instance and the button is still at the bottom of these components?

Thanks.

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Take a look on the code:

<mx:Script>
    <![CDATA[           
        protected function button1_clickHandler(event:MouseEvent):void{
            var textInput:TextInput = newTextInput();               
            vbox.addChildAt(textInput,0);
        }
    ]]>
</mx:Script>
<mx:VBox id="vbox">
    <mx:Button click="button1_clickHandler(event)" label="Click"/>  
</mx:VBox>  

I'm creating a simple text field, and not a custom component as in your case, however I think you can get the idea. I also recommend isolating your mxml component (hbox+childrens) in a different file, for better clarity.