full screen, no decor...how?

["Chris Rose" <chris tangentdevices co uk>]

Hi, can someone tell me in idiots terms how to do the following using GTK:

I want to create a toplevel window to be full-screen, with NO window manager
frame or decoration (ie no CLOSE, MINIMISE etc buttons).

Before anyone says that this is a bad idea, I know that it goes against the
grain of nice windows applications, but I really need to be able to do this.

Cheers,

Fish.