window resizing

[Richard Gipps <rgipps netspace net au>]

I am developing an application using GTK+ 2.4.1 for windows and I have some 
code to create a dialog box with resizable set to FALSE, yet I can still 
resize the window (in the verticle direction only) by a small amount and I 
can not work out why?  Here is the code:

GtkWidget* create_Start_up_wnd(void)
{
  GtkWidget* Start_up_wnd;
  char            Start_up_wnd_text[500] = "/0";
  GtkWidget* Start_up_wnd_label;
  GtkWidget* Start_up_wnd_fixed;

   Start_up_wnd = gtk_dialog_new_with_buttons("P-Syn",
                                              NULL,
                                              GTK_DIALOG_MODAL,
                                              GTK_STOCK_OK,
                                              GTK_RESPONSE_OK,
                                              NULL);
  gtk_window_set_position(GTK_WINDOW(Start_up_wnd),GTK_WIN_POS_CENTER);
  gtk_window_set_resizable(GTK_WINDOW(Start_up_wnd),FALSE);

  //Create fixed area
  Start_up_wnd_fixed = gtk_fixed_new();
  gtk_widget_set_usize(GTK_WIDGET(Start_up_wnd_fixed),462,195);
  gtk_container_add(GTK_CONTAINER(GTK_DIALOG(Start_up_wnd)->vbox),Start_up_wnd_fixed);

  sprintf(Start_up_wnd_text,"\n      P-Syn Version %s, Copyright (C) 2004 
Richard Gipps\n\n  P-Syn comes with ABSOLUTELY NO WARRANTY; for 
details\nselect Help -> Warranty from the P-Syn main menu. This is free\n 
software, and you are welcome to redistribute it under certain\nconditions; 
select Help -> Distribution from the P-Syn main menu.",P_SYN_VERSION);

  Start_up_wnd_label = gtk_label_new((gchar*)Start_up_wnd_text);
  gtk_fixed_put(GTK_FIXED(Start_up_wnd_fixed),Start_up_wnd_label,28,28);

  //Connect signal to the OK button
  g_signal_connect(GTK_OBJECT(Start_up_wnd),
                   "response",
                   G_CALLBACK(On_Start_up_wnd_OK_button_clicked),
                   NULL);

  return Start_up_wnd;
}

Richard.