如何在一个窗体中嵌入另一个窗体。

Form1
uses unit2;
procedure TForm1.FormCreate(Sender: TObject);
begin
form2 := TForm2.Create(Panel,self);
form2.BorderStyle := bsNone;
form2.WindowState := wsMaximized;
form2.Parent := Panel;
form2.Show;
end;

Form2
uses Unit1;
private
FOwnerForm : TForm;
end;

constructor Create(AOwner: TComponent; OwnerForm: TForm ); reintroduce;

constructor TForm2.Create(AOwner: TComponent; OwnerForm: TForm);
begin
inherited Create(Aowner);
FOwnerForm := OwnerForm;
end;

事件触发（在FORM2中来响应FORM1的事件）
procedure TForm2.Button1Click(Sender: TObject);
begin
if self.FOwnerForm.ClassType = TForm1 then
begin
showmessage('a');
end;
end;