public enum CheckboxState| None | 0 | Default state. No state is applied. |
| Checked | 1 | The row is selected |
| Unchecked | 2 | The row will become unselected. |
| Indeterminate | 3 | The row is in an indeterminate state. This is used when the row is part of a group of rows, and some but not all of them are selected. |