This enumeration lists a variety of states that a UI object can take for interactions with accessibility clients.

public enum AccessibleStates {
   None = 0x00000000,
   Unavailable = 0x00000001,
   Selected = 0x00000002,
   Focused = 0x00000004,
   Pressed = 0x00000008,
   Checked = 0x00000010,
   Mixed = 0x00000020,
   Indeterminate = 0x00000020,
   ReadOnly = 0x00000040,
   HotTracked = 0x00000080,
   Default = 0x00000100,
   Expanded = 0x00000200,
   Collapsed = 0x00000400,
   Busy = 0x00000800,
   Floating = 0x00001000,
   Marqueed = 0x00002000,
   Animated = 0x00004000,
   Invisible = 0x00008000,
   Offscreen = 0x00010000,
   Sizeable = 0x00020000,
   Moveable = 0x00040000,
   SelfVoicing = 0x00080000,
   Focusable = 0x00100000,
   Selectable = 0x00200000,
   Linked = 0x00400000,
   Traversed = 0x00800000,
   MultiSelectable = 0x01000000,
   ExtSelectable = 0x02000000,
   AlertLow = 0x04000000,
   AlertMedium = 0x08000000,
   AlertHigh = 0x10000000,
   Protected = 0x20000000,
   Valid = 0x3FFFFFFF
}

Hierarchy

System.Object System.ValueType System.Enum(System.IComparabl, System.IFormattable, System.IConvertible) AccessibleStates

Returned By

System.Windows.Forms.Design.ControlDesignerAccessibleObject.State