Code:

type

TForm1 = class(TForm)

   procedure WndProc (var message: TMessage); override;

private

   { Private declarations }

public

   { Public declarations }

end;

var

Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.WndProc (var message: TMessage);

begin

case message.Msg of                        

    WM_WINDOWPOSCHANGING: PWindowPos(Message.LParam)^.hwndInsertAfter:=HWND_BOTTOM;

end;

  inherited;

end;