<zk>
  <window border="normal" title="hello">
  	<tabbox vflex="1" >
        <tabs>
            <tab label="A" />
        </tabs>
        <tabpanels vflex="1">
            <tabpanel >
                <tree vflex="1"  >
                    <treecols>
                        <treecol label="1" hflex="50"/>
                        <treecol label="2" />
                        <treecol label="3" />
                    </treecols> 
                    <treechildren>
                        <treeitem>
                        <treerow>
                        <treecell label="Item 1"/>
                        <treecell label="Item 1 description"/>
                        <treecell label="Item 1 description"/>
                        </treerow>
                        </treeitem>
                        <treeitem>
                        <treerow>
                        <treecell label="Item 2"/>
                        <treecell label="Item 2 description"/>
                        <treecell label="Item 1 description"/>
                        </treerow>
                        <treechildren>
                        <treeitem>
                        <treerow>
                        <treecell label="Item 2.1"/>
                        <treecell label="Item 1 description"/>
                        </treerow>
                        <treechildren>
                        <treeitem>
                        <treerow>
                        <treecell label="Item 2.1.1"/>
                        <treecell label="Item 1 description"/>
                        </treerow>
                        </treeitem>
                        <treeitem>
                        <treerow>
                        <treecell label="Item 2.1.2"/>
                        <treecell label="Item 1 description"/>
                        </treerow>
                        </treeitem>
                        </treechildren>
                        </treeitem>
                        <treeitem>
                        <treerow>
                        <treecell label="Item 2.2"/>
                        <treecell label="Item 2.2 is something who cares"/>
                        <treecell label="Item 1 description"/>
                        </treerow>
                        </treeitem>
                        </treechildren>
                        </treeitem>
                        <treeitem label="Item 3"/>
                    </treechildren>
                </tree>
            </tabpanel>
        </tabpanels>
    </tabbox>
  </window>
</zk>