Used by CheckBox and CheckedListBox , this enumeration determines whether an item is Checked , Unchecked , or Indeterminate . public enum CheckState { Unchecked = 0 , Checked = 1 , Indeterminate = 2 } HierarchySystem.Object System.ValueType System.Enum(System.IComparabl, System.IFormattable , System.IConvertible) CheckState Returned ByCheckBox.CheckState , CheckedListBox.GetItemCheckState() , ItemCheckEventArgs.{CurrentValue , NewValue} Passed ToCheckBox.CheckState , CheckedListBox.SetItemCheckState() , ObjectCollection.Add() , ItemCheckEventArgs.{ItemCheckEventArgs() , NewValue} |