Customize the title bar of the application

[Alundra]

Hi all,
My question is quite simple, look at visual studio, the title bar of the app is customized :
http://nprogramming.files.wordpress....tor_2012_3.png
I mean the close button, the title bar color, the icon of the app.
If you launch an app from qt you got title bar like basic OS application.
My question is : "Is it possible to customize the title bar of the application" ?
Will that be for all title bar of the application as well as QDialog window ?
Thanks for the help