procedure TForm1.TreeView1CustomDraw(Sender: TCustomTreeView;
const ARect: TRect; var DefaultDraw: Boolean);
var
btop, bLeft: Integer;
rect: Trect;
x, y, h: integer;
begin
x := GetScrollPos(sender.Handle, SB_HORZ);
y := GetScrollPos(sender.Handle, SB_VERT);
h := 17;