<window border="normal" width="500px">
<hbox >
<vbox  heights="100px,100px">
Column 1-1: The left-top box. To know whether a splitter
is collapsed, you can listen to the onOpen event.
<splitter  collapse="before"/>
Column 1-2: You can enforce to open or collapse programming
by calling setOpen method.
</vbox>
<splitter collapse="before"/>
<tree id="myTree">
<treecols>
<treecol label="Name" />
</treecols>
</tree>
</hbox>
</window>