I am trying to an Option Group (Radio Button) Control on a form. I would like to have a variable (m.DemoFlag) as the ControlSource so that I can use it in coding for the different options selected. When I enter m.demoflag in the ControlSource for the control I get the error 'Error w\ OptionGroup1 - Value; Data type mismatch. Unbinding Object OptionGroup1'. What am I missing?

TIA
Phyllia