TCustomGroupBox = class(TCustomControl)
class PASCALIMPLEMENTATION TCustomGroupBox : public Vcl::Controls::TCustomControl
TCustomGroupBox is the base class for all group-box components.
Group boxes are visual components that act as containers for sets of related controls, such as radio buttons. Group boxes may also contain other group boxes. TCustomGroupBox is the class from which all group-box components—including TGroupBox, TRadioGroup, and TDBRadioGroup—descend.