Use the SelectedTabItem property to select a tab item. You can also use the DXTabControl.SelectedIndex property to select the required tab item by its index within the Items collection. To obtain whether a tab item is selected, use its DXTabItem.IsSelected property.
The tab control allows you to hide individual tab items. Using the DXTabControl.SelectedIndex or SelectedTabItem properties to select a hidden tab item does nothing. In this instance, use the ShowTabItem method.
Setting the SelectedTabItem property to a new value fires the SelectionChanging event. This event is raised before a tab item is selected, allowing you to cancel the action. After the item has been selected, the SelectionChanged event is fired.