Describes a radiogroup (TRadioGroup). A radiogroup may contain radioitems that belong together.
An onchange event occurs when the another radioitem of the radiogroup is selected. When the onchange attribute has the value true, an entry, for handling the onchange event, will be created in the code-frame of the window the popupmenu is in. Allowed values are true and false. The default value is false.
Specifies the title to display at the top of the radiogroup.