I believe this problem was already discussed here a while ago and AFAIK was resolved.

>I need help from anyone using the ctl32_scontainer control by Carlos Alloatti.
>http://www.ctl32.com.ar/ctl32_scontainer.asp
>
>I messaged him, and I understand he's moving so he can't get back right away, but
>I need help with this control.
>
>It work great - when it works.
>
>The scrollbar container requries you to place a client area containe on it. I did, and in the
>resize it is not working.
>
>The client area is being moved in the control's Resize. There is alot of code in this control, and
>I don't see what's going on.
>
>Here's a pic of a demo form showing the behavior:
>http://marois-consulting.com/stuff/ctl32_scontainer.jpg
>
>Anyone know what's going on?
>
>Thanks