Checkbox in datagridview

[waner michaud]

Hi, I add a checkbox in a datagridview that is an unbound column. Onload it is an unchecked state, when I click on it, I get this error message Index -1 does not have a value. I am lost.. what i want to do is to able to check and uncheck the checkbox to do insert, delete current row selected... Can anyone guide me please.. thanks advance

[Scubapro]

Then probably your row contains no (actual) data. But why use a checkboxcolumn for this and not .SelectedItems ?