can GtkWindow be a child of another GtkWindow?

[Binary Chen <binary chen gmail com>]

Hi,

I have a GtkWindow with type GTK_WINDOW_POPUP, I want it to be a child
of a GtkWindow, the effect will be the pop up window can only move
within the scope of the parent window. And if I invoke the position
function for the popup window, the coordinat parameters is relative to
the parent window.

Is it possible? Or any alternative way to achieve this?

Thanks.
Bin