Did you add the checkbox via grid.AddCheckBox? This adds an always visible checkbox to a cell. When you add a checkbox to a cell, make sure the grid/cell is editable, otherwise, the checkbox is displayed as a read-only checkbox.
Did you add the checkbox via grid.AddCheckBox? This adds an always visible checkbox to a cell. When you add a checkbox to a cell, make sure the grid/cell is editable, otherwise, the checkbox is displayed as a read-only checkbox.