Eclipse cannot find GTK+ libraries

[<polat ee bilkent edu tr>]

Hi,
I'm using Fedora Core 3 and trying to compile a simple Hello World 
program by using GTK+ and Eclipse 3.0.2. But Eclipse cannot find 
either "config.h" or "gtk/gtk.h" (the source is given below and taken 
from http://bo.majewski.name/bluear/gnu/GTK/plain/index.htm )

First I thought I didn't have GTK+ development libraries and 
compiled the following libraries,
pkg-config-0.15.0,  Glib-2.6.4,  Atk-1.9.0,  Pango-1.8.1,  Gtk+-2.6.7,  JPEG-6b,  Libpng-1.2.8,  tiff-v3.6.1.
But it didn't compile -again-.

I am stuck at the beginning. 
Any help will be great.

Polat

Source:
#include <config.h>
#include <gtk/gtk.h>

static void on_destroy (GtkWidget * widget, gpointer data)
{
     gtk_main_quit ();
}

int main (int argc, char *argv[])
{
	GtkWidget *window;
    GtkWidget *label;

    gtk_init (&argc, &argv);

    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

    gtk_container_set_border_width (GTK_CONTAINER (window), 20);

    gtk_window_set_title (GTK_WINDOW (window), PACKAGE " " VERSION);

    gtk_window_set_default_size (GTK_WINDOW (window), 200, 50);

    gtk_window_set_default_icon_from_file (PIXMAPS_DIR "/hello-icon.gif",
                                            NULL);


     g_signal_connect (G_OBJECT (window), "destroy",
                       G_CALLBACK (on_destroy), NULL);

     label = gtk_label_new ("Hello, World");

     gtk_container_add (GTK_CONTAINER (window), label);

     gtk_widget_show_all (window);

     gtk_main ();

     return 0;
}