GTK mouse position

[éæå (CottonChen) <CottonChen awindinc com>]

Dear all,
    I'm new in developing applications by GTK.
    I'd like to get the current mouse poistion and mouse image from current screen.
    After searching by Google and from Gnome library manuals, I could only find XQueryPointer that satisfies 
me needs. But is there any interfaces in GTK+/GDK could do this? I mean get current mouse pointer's position 
and image. 
    I don't want to include any of Xlib's files or using Xlib's interfaces because I'd like to port the 
Application to MAC with GTK+ and without X.
 
--
Cotton Chen