Thank you Jens, this really helped resolve my issue.
Here is the working code for other with this same issue:
I needed a grid that displays images of a vehicle selected from a database on the key field IDVehicle where tbl_Images.IDVehicle = tbl_Vehicles.IDVehicle. There may be many images for the vehicle so I need to be able to allow the user to select one image as the 'default' or main image to use on reports. To do this I wanted to add a radio button to the grid so that when the user selects the radio button the database would be updated so that the DefaultImage field (SQLDataType = BIT) would be set to True for the selected radio button and all of the other buttons with the same IDVehicle would be set to False.
Thank you for sharing your experience and provide the working example.
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