I have a grid with 4 columns in. The first 2 columns are bound to a table named BOM. The 3rd column is bound to another field in another table which is related named articles. Against the record in articles are a number of checkbox fields check1.......check4. Only one checkbox can be checked at one time. How can I programmtically set the controlsource to column4 on my grid dependant on which checkbox is checked. I dont want true to false I want the label of the checkbox to be populated in the column4 fieldi.e. check1