Can't draw to root window

[Chubb <chubb untraceable net>]

Hi.

I am trying to draw to the root window and am failing to do so.  

Below is a small piece of code which shows the problem, I think.
Every time i try to do something to the root window (such as
gdk_draw_rectangle, nothing happens.  

The code shows that the clipbox is set to (0,0,0,0), i.e., everything
sent to the rootwindow is clipped, so nothing appears on the screen.
(At least, I think that this is what is wrong.) 

I think that I need to (somehow) get the clipbox to not be (0,0,0,0),
but I am not sure how to do this.  Can anyone see what I am doing
wrong?

Also, the code below also shows that the size of the root window
is 1024x768, which is indeed my display size, so it looks like I
really am getting the root window appropriately.  The output when
I run the snippet is: 

Window type = 0
pstRegion=0x805c498
x=0  y=0  width=0  height=0
w=1024, h=768
iState=0
visible=1

And the code is this:

/*************************************************/

GtkWidget *pstRootWidget = NULL;
GdkWindow *pstRootWindow = NULL;



void vGraphicEnvironmentInitialization3(){
  pstRootWindow = GDK_ROOT_PARENT();

  g_print("window type = %d\n", gdk_window_get_window_type(pstRootWindow));

  gdk_window_show(pstRootWindow);

  {
    GdkRegion* pstRegion =  gdk_drawable_get_visible_region (pstRootWindow);
    GdkRectangle* pstRectangle = malloc(4*sizeof(gint));
    GdkWindowState iState = gdk_window_get_state(pstRootWindow);
    int w, h;

    g_print("pstRegion=%p\n", pstRegion);  fflush(NULL);
    gdk_region_get_clipbox(pstRegion, pstRectangle);
    g_print("x=%d  y=%d  width=%d  height=%d\n", pstRectangle->x, 
             pstRectangle->y, pstRectangle->width, pstRectangle->height);

    gdk_drawable_get_size(pstRootWindow, &w, &h);
    g_print("w=%d, h=%d\n", w, h);

    g_print("iState=%d\n", iState);
    g_print("visible=%d\n", gdk_window_is_visible(pstRootWindow));
  };
};


int main(int argc, char *argv[] ){

  gtk_init(&argc, &argv);
  vGraphicEnvironmentInitialization3();
  gtk_main ();

  return 0;
}