xpm in place of button...

["Hari Prasad Nadig" <hpnadig myrealbox com>]

GtkWidget *pixmap, *fixed;
GdkPixmap *ic_pixmap;
GdkBitmap *mask;
GtkStyle *style;
GdkGC *gc;

   style = gtk_widget_get_default_style();
   gc = style->black_gc;
   ic_pixmap = gdk_pixmap_create_from_xpm_d( window->window, &mask,&style->bg[GTK_STATE_NORMAL],ic_xpm );


   pixmap = gtk_pixmap_new( ic_pixmap, mask );

   fixed = gtk_fixed_new();
   gtk_widget_set_usize( fixed, 80, 105 );
   gtk_fixed_put( GTK_FIXED(fixed), pixmap, 0, 0 );

   gtk_table_attach_defaults (GTK_TABLE(*table_ics),fixed, 8, 10, 5, 8);

   gtk_widget_show( pixmap);
   gtk_widget_show( fixed );


This is my code. It generates a transparent image alright. But what do I do to give it a functionality of button?