'Declaration Public Property Appearance As Infragistics.Win.AppearanceBase
public Infragistics.Win.AppearanceBase Appearance {get; set;}
The Appearance property is the default appearance for all the elements used by the UltraTabbedMdiManager. It is used when resolving the appearance of the tabs, tab area, splitter bar, tab list button, close button and scroll buttons. If you want to control those items individually, you may use the specific appearance properties for those items. For example, to affect only the splitter bar you can use the SplitterAppearance.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2