'Declaration
Public Property IsThreeState As Boolean
'Usage
Dim instance As CheckBox
Dim value As Boolean
instance.IsThreeState = value
value = instance.IsThreeState
Property Value
true if the checkbox can be in an undetermined state; false if the checkbox can only be checked or unchecked. If set to true, the IsChecked property will return a null reference (Nothing in Visual Basic) in the case where the checkbox is in an undetermined state. By default, false.
Requirements
Target Platforms: Windows 11, Windows, 10, 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
