AutomationOrientation Enumeration
.NET Framework 4.5
Specifies the direction in which a control can be laid out.
Namespace: System.Windows.Automation.Peers
Assembly: PresentationCore (in PresentationCore.dll)
Controls that can be laid out horizontally or vertically include ScrollBar, Slider, and TabControl.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.