The RemoveAt method removes a UltraTab from the Tabs collection based on the UltraTab.Index it is passed. The following code will remove the first tab in the collection.
UltraTabControlBase.Tabs.RemoveAt(0)
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