horse/resource/eui_skins/ScrollerSkin.exml

<?xml version="1.0" encoding="utf-8"?>
<e:Skin class="skins.ScrollerSkin" minWidth="20" minHeight="20" xmlns:e="http://ns.egret.com/eui">
    <e:HScrollBar id="horizontalScrollBar" width="100%" bottom="0"/>
    <e:VScrollBar id="verticalScrollBar" height="100%" right="0"/>
</e:Skin>