<mx:Panel title="Select activities" layout="horizontal">
<mx:VBox width="50%">
<mx:Label text="Available activities"/>
<mx:List
id="srclist" width="100%" height="100"
allowMultipleSelection="true"
dragEnabled="true"
dropEnabled="true"
dragMoveEnabled="true"
/>
</mx:VBox>
<mx:VBox width="50%">
<mx:Label text="Activities I enjoy"/>
<mx:List
id="destlist" width="100%" height="100"
dropEnabled="true"
dragEnabled="true"
allowMultipleSelection="true"
dragMoveEnabled="true"
/>
</mx:VBox>
</mx:Panel>