Specifies the ID of a group to which a check box belongs.
A string that specifies the ID of a group owning the check box.
The GroupID setting defines the behavior of an XRCheckBox control in Print Preview.
When this property is set to null or an empty string value, a check box in Print Preview can be switched either to the "checked" and "unchecked" state independently on other available check boxes.
For more information, see Content Editing in Print Preview.