The list box also supports multiple columns. When user selects an item, the entire row is selected.

To specify a multi-column list, you need to specify the listcell components as collumns of each listitem (as a row).

<listbox width="200px">
    <listitem>    
        <listcell label="George"/>        
        <listcell label="House Painter"/>        
    </listitem>    
    <listitem>    
        <listcell label="Mary Ellen"/>        
        <listcell label="Candle Maker"/>        
    </listitem>    
    <listitem>    
        <listcell label="Roger"/>        
        <listcell label="Swashbuckler"/>        
    </listitem>    
</listbox>