Returns a Boolean value that determines whether the CheckState property is set to its default value.
Returns True if the CheckState property is not set to its default value; otherwise, it returns False.
Invoke the ResetCheckState method to reset this property to its default value.
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