why that not working?

[=?big5?b?tsC8eSBLYXNvbiBIdWFuZw==?= <kasonhuang kinposh com cn>]

hello:
for creating a colorful button,I do a testing code,however,that not working?
why and how to do?anyone could help me?

#include<gtk/gtk.h>
#include<gdk/gdkx.h>

GdkColor cyan = {0,0x0000,0xFFFF,0xFFFF};

int main(int argc,char *argv[])
{
  GtkWidget *window;
  GttkWidget *button1;
  GtkWidget *button2;
  GtkWidget *vbox;

  gtk_init(&argc,&argv);
  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_signal_connect(GTK_OBJECT(window),"destroy",GTK_SIGNAL_FUNC(gtk_exit),NULL);

  vbox = gtk_vbox_new(TRUE,2);
  gtk_container_add(GTK_CONTAINER(window),vbox);
 
  button1= gtk_button_new_with_label("1");
  gtk_widget_realize(button1);
  gdk_window_set_background(button1->window,&cyan);   //not working,why?
  gtk_box_pack_start(GTK_BOX(vbox),button1,TRUE,FALSE,0);
  
   button2= gtk_button_new_with_label("2");
  gtk_widget_realize(button2);
  gdk_window_set_background(button2->window,&cyan);   //not working,why?
  gtk_box_pack_start(GTK_BOX(vbox),button2,TRUE,FALSE,0);

  gtk_widget_show(button1);
  gtk_widget_show(button2);
  gtk_widget_show(vbox);
  gtk_widget_show(window);

  gtk_main();
  return 1;
}

Thank you in advance!   waiting for your mail back.

you can get me by mail :
kasonhuang kinposh com cn
											kason