[Dev-C++] Nice buttons

[<jal...@go...>]

OS: MSW-XP
GTK+: 2.0.X

Hi!
I've noticed that some of the buttons showed in the gtk documentation
have an icon with them, for instance the 'Cancel' button has an red

'X' next to it, likewise the 'OK' button has a folded arrow.
What do I do to get the same nice look on my buttons?

Thanks