<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" width="300" height="250" >
    <s:layout>
        <s:VerticalLayout />
    </s:layout>
    <s:Button id="buttonId" label="Test"/>
    <s:Button label="Test"/>

    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
    <s:Button label="Test"/>
</s:Application>