type
  TGroupPanel = class(TWinControl);

  TForm1 = class(TForm)
    Group: TGroupPanel;
    procedure FormCreate(Sender: TObject);
  private
    Panel:TPanel;
  end;

procedure TForm1.FormCreate(Sender: TObject);
begin
 Panel:=TPanel.Create(Group);
 Panel.Parent:=Group;
 Panel.Align:=alClient;
end;