Tree component (detecting which node the mouse is over)

Does anyone know a simple way to use an onRollOver for nodes within a Tree component in MX 2004 pro?

I’d like to display information related to the nodes (which represent files or folders) when the user rolls over them. I’d like to use the same method that causes the nodes to highlight when the mouse is over them but am having a bit of trouble finding any info in the documentation for the tree comp.

Cheers for your help