-Cambio disco:
	GtkWidget *dialog;

	dialog = gtk_file_chooser_dialog_new ("Open File",
					      parent_window,
					      GTK_FILE_CHOOSER_ACTION_OPEN,
					      GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
					      GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
					      NULL);

	if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
	  {
	    char *filename;

	    filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
	    open_file (filename);
	    g_free (filename);
	  }

	gtk_widget_destroy (dialog);

