True to mark this column as a checkbox column. Checkbox columns show
checkboxes instead of text. Whenever an item's text in a checkbox column is set to
"On", "True", or "1", the checkbox will be selected. All other item texts will lead
to an unselected checkbox.
You can modify the states of the checkboxes either by using the Listview.Rename method or by using the dedicated Listview.SetState method. Similarly, getting the state of a checkbox is possible via the Listview.GetEntry or Listview.GetState methods.
To get notified whenever the user toggles a checkbox state, you have to listen to the Listview.ValueChange attribute.
Also note that Listviewcolumn.Checkbox and Listviewcolumn.Editable and Listviewcolumn.Icon are mutually exclusive. You cannot create checkbox columns that are editable or show icons.