pnl := TPanel.Create(MyScrollBox);
    pnl.Parent := MyScrollBox;
    pnl.Align := alTop;
    pnl.Height := 18;
...

    chk := TCheckBox.Create(pnl);
    chk.Parent := pnl;
    chk.Align := alLeft;
    chk.Width := 17;
...

    lb := TLabel.Create(pnl);
    lb.Parent := pnl;
    lb.Align := alClient;
...