Window style

[almost]

Is it possible to make main with a larger title bar ... something like Mac iTune?

[jpn]

With Qt, no, it's not. Qt is not responsible for the title bar. It is provided by the underlying system, window manager. You can adjust the size of the title bar in WinXP (Control Panel -> Display Properties -> Appearance). This setting will, however, adjust sizes of each and every, current and future title bar, not just your program's title bar.

Another option could be using a frameless window and drawing a custom title bar by hand (for example with help of styles). This would naturally require also implementation for a bunch functionalities which are normally provided by the window manager. Like window movement, minimizing, maximizing etc.