Автор: http://www.swissdelphicenter.ch

procedure TForm1.Button1Click(Sender: TObject);
 var
   ms: TMemoryStream;
   newform: TForm1;
 begin
   ms := TMemoryStream.Create;
   try
     ms.WriteComponent(Form1);
     newform := TForm1.CreateNew(Application);
     ms.Position := 0;
     ms.ReadComponent(newform);
     { show the new form. Note that it will appear exactly on top of the 
     original! You may want to change its Left and Top property to move it 
     a bit. 

     Zeigt die neue Form. Die neue Form erscheint genau oberhalb der 
     original form. Die Left, Top Properties mussen evtl. noch angepasst werden 
    }
     newform.Show;
   finally
     ms.Free
   end;
 end;