The shape is driven by enabled / disabled behavior and enabled / disabled caption.
So you can control this by binding the EpiShape to a CheckBox, when the CheckBox is Checked RowRule Disable
Then set an Enabled / Disabled Caption on the EpiShape.
That will give you 2 States of the EpiShape (Enabled Green / Disabled Gray)
There are ways to change its color too but that requires a bit of code. Which is pretty easy in the InitializeCustomCode set the Status Type of the Shape to one of these
/*
StatusTypes.Warning //Yellow
StatusTypes.Global //Blue
StatusTypes.OK //Green
StatusTypes.Stop //Red
*/
epiShapeC1.Status=StatusTypes.Stop;
