Having happily understood the available tutorials, I continued looking at
the Kitchen Sink example.
Then I noticed that there was something different when you click a
category(a Rollup), so I checked out how it is in other UI's in my OS. Then
I made it like this
<Rollup wtkx:id="buttonsRollup">
<heading>
<Label text="Buttons"
styles="{fontBold:true, fontSize:12, color:13}" cursor="hand"/>
</heading>
</Rollup>
Surprisingly (for me) it's now more user friendly. How about underlining the
label like the link buttons? Should I code for a MouseListener and add it to
the label?