How to get rid of minimize button?

[Саша Иваненко <kitovyj mail ru>]

Hi all.

I am developing GUI application for win using gtkmm/glade. Problem is I can't get rid of minimize button on 
my modal dialog boxes. I create dialogs as modal Gtk::Window instances in glade. I don't want to use 
Gtk::Dialog because of a space added to the bottom of the layout. But even if I use Gtk::Dialog "minimize" 
button is always there! Please help.

Thank you.
Alexander Ivanenko.