Visual Styles contain graphics, measurements and other properties, which are used to modify the look and behaviour of the Windows UI.
The concept of Visual Styles came up in early Whistler builds, which started to use themes rendered with graphics instead of the hardcoded, pure shellstyle, which is known as "Windows Classic" or "Windows Default" now. In history of Windows, many Visual Styles were developed, of these many didn't find their way into final releases.
All Visual Styles
|Windows Classic||Windows 95 to Windows 7||Yes|
|Experimental Whistler Themes||Whistler 2410-2419||No|
|Royale||Windows XP MCE||Yes|
|Embedded||Windows Embedded 2009||Yes|
|Windows Basic||Windows Vista to Windows 7||Yes|
|Aero||Longhorn M6 to the present||Yes|
|Aero Lite||Windows 8||Yes|