The CheckState property is only applicable when the UltraListView control's View property is set to 'Details' or 'List'.
When the CheckState property is set directly, a property change notification is issued; when an application needs to set the property on a large number of items, this can adversely affect performance. The UltraListViewCheckedItemsCollection.SetCheckState method can be used to set the CheckState property on multiple items while only issuing one property change notification.
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