If your column in your DataTable is of type boolean, then you should not have to do anything to get things working. If your column is some other type, then you will have to set the GridBoundColumn.StyleInfo.CellType and CheckBoxOptions to make things work properly.
Here is a sample that shows a bool datacolumn working initially when the grid is displayed. The grid also has a string column showing T''s and F''s, and an int column showing 1''s and 0''s. There is a button you can click that sets the CellType and CheckBoxOptions for these additional columns so they show as checkboxes.
forum11733_668.zip