Please, help-me, show itens selected in tree_view

[Ranieri <ranieri_savage yahoo com br>]

How to show to which item this chosen team in tree_view?  
The part of the source code that is wrong is commented.  

Very Obliged

#include <stdio.h>
#include <gtk/gtk.h>

int main(int argc, char **argv)
{
   int i;
  
   GtkWidget *main_window;
   GtkWidget *fixed_mw;   
   GtkWidget *tree_view;
   GtkWidget *scrolled_window;
   GtkListStore *model;
   GtkTreeIter iter;
   GtkCellRenderer *cell;
   GtkTreeViewColumn *column;

   gtk_init(&argc, &argv);

   main_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
   gtk_window_set_title(GTK_WINDOW(main_window), "MyTitleMyTitleMyTitle");
   gtk_widget_set_usize(main_window, 650, 350);
   g_signal_connect(G_OBJECT(main_window), "destroy", 
G_CALLBACK(gtk_main_quit), NULL);

   fixed_mw = gtk_fixed_new();
   gtk_container_add(GTK_CONTAINER(main_window), fixed_mw);

   model = gtk_list_store_new(1, G_TYPE_STRING);
   
   tree_view = gtk_tree_view_new();
   gtk_tree_view_set_model(GTK_TREE_VIEW(tree_view), 
GTK_TREE_MODEL(model));

   scrolled_window = gtk_scrolled_window_new(NULL, NULL);    
   gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window), 
GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
   gtk_fixed_put(GTK_FIXED(fixed_mw), scrolled_window, 5, 50);
   gtk_widget_set_usize(scrolled_window, 640, 300);
  
   
gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(scrolled_window), 
GTK_WIDGET(tree_view));
 
   GtkTreeSelection *selection = gtk_tree_view_get_selection 
(GTK_TREE_VIEW(tree_view));
   gtk_tree_selection_set_mode (GTK_TREE_SELECTION(selection), 
GTK_SELECTION_MULTIPLE);
   
   for (i=0;i<20;i++)
   {
       gchar *msg = g_strdup_printf ("Item%d", i+1);
       gtk_list_store_append(GTK_LIST_STORE(model), &iter);
       gtk_list_store_set (GTK_LIST_STORE(model), &iter, 0, msg, -1);
       g_free(msg);
   }
   
   cell = gtk_cell_renderer_text_new();
   column = gtk_tree_view_column_new_with_attributes("Itens", cell, 
"text", 0, NULL);
   gtk_tree_view_append_column(GTK_TREE_VIEW(tree_view), 
GTK_TREE_VIEW_COLUMN(column));

   /* The error is here - Start*/
   gtk_tree_selection_select_all(selection);
   GtkTreeModel *model2;
   GList *l = gtk_tree_selection_get_selected_rows(selection, &model2);
   g_list_first(l);
   g_print("%s\n", l->data);
   /* The error is here - End*/

   gtk_widget_show(scrolled_window);
   gtk_widget_show(tree_view);
   gtk_widget_show(fixed_mw);
   gtk_widget_show(main_window);
   
   gtk_main();
   
   return 0;
}