Main window with custom buttons ?

[probine]

I would like to be able to customize the main window displayed by Qt.

The idea is that I want to be able to get rid of the top bar of a regular window, this means, get rid of the minimize, maximize, and close buttons. I want of course to add my own buttons there, so it will look as I want it to look.

I have attached an image of a program. I would like to create a window looking like the one in the attached image.

Is it possible ?
How?

[jpn]

See these threads:
http://www.qtcentre.org/forum/f-qt-programming-2/t-window-style-3692.html
http://www.qtcentre.org/forum/f-qt-programming-2/t-setwindowtitle-with-nice-font-1123.html
http://www.qtcentre.org/forum/f-qt-programming-2/t-mouse-dragged-widget-without-title-4412.html
(..and there are even more threads discussing about things related more or less to this)