Hi I have one ultragrid which contains checkbox column, I used the following code to disable this column, but it did not work. The checkbox column was grayed but still can check or uncheck the checkbox in the column.

ultraGrid1.DisplayLayout.Bands[0].Columns["checkboxcolumnName"].CellActivation = Activation.Disabled;

I want to gray this column, also could not check or uncheck the checkbox in the column. Could you please help on this? Thanks a lot.