Layout controls with VBox
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:VBox width="400" height="300" verticalGap="20"> <mx:Button label="Button"/> <mx:ComboBox top="60"/> <mx:Spacer height="20"/> <mx:LinkButton label="Link Button"/> </mx:VBox> </mx:Application>