This is a copy of the Nexus implementation we use on the Cool Focus website (although with the links removed).

This example shows Nexus in '3D' mode: the ItemsAsButtons parameter is set to yes so that menu items look and behave like buttons. The ScrollBarStyle is set to 3D, and the TogglesAsButtons parameter is also set to 'yes'.

We've also hidden the tree-structure lines by setting the LineColor parameter to match the BgColor parameter.

If you click How To Buy (which should be a link) you'll see that ExpandLinks is set to 'yes', so the item also expands to show its subitems.