add: gtk_label_set_markup ( GTK_LABEL ( label_titre_fichier ), g_strconcat ("<span size=\"x-large\">", (gchar *) gtk_entry_get_text (GTK_ENTRY (entry)), "</span>", NULL ) );
context: update_homepage_title (GtkEntry *entry, gchar *value, 		       gint length, gint * position){  gtk_label_set_text ( GTK_LABEL(label_titre_fichier), 		       (gchar *) gtk_entry_get_text (GTK_ENTRY (entry)) );  return FALSE;}