root window/ screen /display

[Shaun Savage <ssavage infomatec de>]

Hi

I am new to gdk but I have looked at the code from the cvs 2001/02/03. 
 I am tring to write a "Window Manager" using gdk, NOT X11.  In the
future
there may be frame buffer instead of X.  To support this I am trying to
get one of 
display/screen/root_window from gdk. But the is GDKFBDisplay for frame
buffer and Display for X.  And GdkFBWindow and Window for the
gdk_root_window.  

Is there a function the normalizes the lower level window to GdkWindow?

With this I can then create a WM using gdk.

Shaun Savage