child window

["Massimo" <max_f abaconet it>]

Hi,
I have used  "MIT-SHM" , then I would have a window created with GTK 
(like : main_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);)for user interface with button and other tool and 
under this window I would create an child window with:
window=XCreateWindow(display,win,0,0,width, height,0, depth,InputOutput, visual, 0, NULL);