<div>
    <zscript>Object[] o = new Object[10];</zscript>
    <button id="btn" label="delete" onClick="deleteSelection();"/>
    <listbox id="list" width="300px" checkmark="true" multiple="true">
        <listhead>
            <listheader>
                <label value="Column"/>
            </listheader>
        </listhead>
        <listitem forEach="${o}">
            <listcell label="value"/>
        </listitem>
    </listbox>
    <zscript>
        <![CDATA[
            public void deleteSelection() {
                for(Listitem item : list.getSelectedItems()) {
                    list.removeItemAt(item.getIndex());
                }
            }
        ]]>
    </zscript>
</div>

<style>
    .no-scroll-bar .z-listbox-body {
       overflow: hidden;
    }
</style>