Window Decorations

[Surya Kiran Gullapalli <skg fluent co in>]

Hi,
I'm trying to set the decorations for my Gtk::Dialog.
I've over ridden on_realize() function like this.

//My dialog derived from Gtk::Dialog
void MyDialog::on_realize()
{
	Gtk::Dialog::on_realize() ;
	get_window()->set_decorations (Gdk::DECOR_ALL | Gdk::DECOR_RESIZEH | Gdk::DECOR_TITLE) ;
	return ;
}

But what ever decorations i'm giving, I'm always getting the same decorations (all the decorations, title bar, minimize, maximize etc.)
But  if i call set_resizable(false), in my dialog constructor, i'm getting proper results. (like the maximize button is not there and the resize controls are absent). 
What i want to do is to delete other controls also like close button on the top right corner of the window. 

Am i missing some thing here. 

Thanks in advance,
Surya

Surya Kiran Gullapalli
Sr. Development Engineer
Fluent India Pvt. Ltd.,
Pune