layouts VertScrollBox dont show scroll bars after adding elements dynamically
<p>i have a blank vertscrollbox at design time.
the vertscrollbox  have client align into the expander3 :</p>

<p><a href="https://i.stack.imgur.com/vVqVW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vVqVW.png" alt="enter image description here"></a></p>

<p>at run time i will add some button to vertscrollbox by this code:</p>

<pre><code>  btnSelect := TButton.Create(VertScrollBox2);
  btnSelect.OnClick:= btnSelectCick;
  btnSelect.Parent := VertScrollBox2;
  btnSelect.Align := TAlignLayout.Scale;
  btnSelect.Position.X := cng*70;
  btnSelect.Position.Y := bng*70;
  btnSelect.Width := 60;
  btnSelect.Height := 60;
  btnSelect.text := 'Select'+bng.ToString+cng.ToString;
  btnSelect.name := 'Select'+bng.ToString+cng.ToString;
</code></pre>

<p>after 9 time run the above code it be like this:</p>

<p>you can see there is no scrollbar and some part of buttons is hiding under the border</p>

<p><a href="https://i.stack.imgur.com/c11JZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/c11JZ.png" alt="enter image description here"></a></p>

<p>how can i force vertscrollbox layout to show scrollbars? or update the alignment in runtime!?</p>