[hogeuser]$ ./configure --prefix=/home/hogeuser/tamesi_inst/

tamesi_inst
+--bin
+--share
:  +--sample_icon_test    ここは、プログラム名と同じ名前になる
:  :  +--pixmaps

void
on_button1_clicked                     (GtkButton       *button,
                                        gpointer         user_data)
{

}

void
on_button1_clicked                     (GtkButton       *button,
                                        gpointer         user_data)
{
    // get pointer entry1 to button
    GtkEntry *entry1 = (GtkEntry*)lookup_widget ( GTK_WIDGET(button), "entry1") ;
    // set new text to entry1
    gtk_entry_set_text (GTK_ENTRY (entry1), _("hello entry1"));
    // get pointer entry1 to button
    GtkEntry *entry2 = (GtkEntry*)lookup_widget ( GTK_WIDGET(button), "entry2") ;
    // set new text to entry2
    gtk_entry_set_text (GTK_ENTRY (entry2), _("hello Entry2"));

}

  combobox1 = gtk_combo_box_new_text ();
  gtk_widget_show (combobox1);
  ........
  gtk_combo_box_append_text (GTK_COMBO_BOX (combobox1), _("abc"));
  gtk_combo_box_append_text (GTK_COMBO_BOX (combobox2), _("def"));
  gtk_combo_box_append_text (GTK_COMBO_BOX (combobox3), _("ghi"));
  ........
  gtk_combo_box_set_active(GTK_COMBO_BOX (combobox1), 0);
  ↑追記する内容。0は、indexの最初を示す。２番目を初期表示させたい場合は、ここを1にする。