//hello.vala
using Gtk;

int main (string[] args) 
{     
    Gtk.init (ref args);
        Gtk.Builder builder  =  new Gtk.Builder ();
	            builder.add_from_file ("helloworld.ui");
                var window  =  builder.get_object ("window") as Gtk.Window;
                var liststore = builder.get_object ("liststore") as ListStore;              
                builder.connect_signals (null);
		var theme = new Gtk.IconTheme();
	
		TreeIter iter;
		var pixbuf = theme.load_icon("chm", 48, 0);
		liststore.append (out iter);
		liststore.set(iter,0,pixbuf);

        window.show_all ();
        Gtk.main ();
    return 0;
}