very basic question

[Andy Gilman <amgilman myfairpoint net>]

A newbie (seemingly perpetually), I am stumped trying to change the 
background color of an eventbox.  I have included this line:

  eventbox.modify_bg(Gtk::STATE_NORMAL, &color)

(having defined a color, I think appropriately), but I keep being told 
that eventbox has no member called "modify_bg.  Obviously I am missing 
something obvious, but what?

Thanks.

Andy Gilman