Focus row in a GtkCTree

[dg tao-group com]

Does anyone know how to *set* the focus row in a GtkCTree? I've found out how to
retrieve it, and I've found out how to get and set the selection, but I can't
seem to find any way of programmatically changing the focus row. (I want the
same behaviour that you get when you manually click on a row.)

-- 
+- David Given ---------------McQ-+ "`Aplysia californica' is your taxonomic
|  Work: dg tao-group com         | nomenclature.
|  Play: dgiven iname com         | A slug, by any other name, is still a slug
+- http://wired.st-and.ac.uk/~dg -+ by nature." --- drushel on a.f.c