How do I define x & y for Window positioning?

["Glen Gibson" <glen_gibson maxnet co nz>]

Another easy one.

I'm trying to figure out how to positition a window (type is toplevel incase
it's relevant).

With Gtk2::Window::set_position($window,'[position parameter]');

I can centre it and stuff, but how the heck do I give it an x & y value to
fix it to?  (e.g. if I wanted to attach it to the bottom of the screen or
the top of the screen?)

Glen