I use Windows 7 Home Premium. Recently, when I came through Photoshop in OSX, I was interested by its user interface. It has got a "100% transparent" user interface background, whereas it's usually gray in Windows.
I googled for some glass solutions, but all of them provide a "transparent window" or a semi-transparent one, which makes the complete window transparent. These solutions do not work for me, as I just need the UI (gray) background transparent but require all the other elements (such as nav-bars, control buttons, etc.) to have no transparency.
Below is a screenshot of what I'm saying:
Is this a feature of Photoshop only? How can I achieve the same in Windows 7?