Property Value
The actual meaning of this property depends on the IControl.FormControlType of the current control.FormControlType.CheckBox : False - Unchecked, true - Checked, a null reference (Nothing in Visual Basic) (Nothing) - Mixed.
FormControlType.OptionButton : False - Unselected, true - Selected.
FormControlType.Spinner, FormControlType.ScrollBar : The current value.
FormControlType.ListBox, FormControlType.DropDown : ISelector.SelectedIndex + 1.