This method updates the recognition zone editor GUI's collection of marks to match the zones currently defined by the recognition page and also draws the marks. A zone mark is a shaded area overlaid over an image which represents the location, size, and type of a corresponding recognition zone. NOTE: This method does not need to be called in paint event handlers. Typically it's called after zones have been detected or manipulated via methods of the recognition page, rather than the recognition zone editor GUI.

Reference

ImGearRecZoneGUI Class
ImGearRecZoneGUI Members