Scrolling for two controls

[Tim Bücker]

Hello.

I have a listview and a listbox. If the listbox gets vertically scrolled,
the listview should make the same movement.
So I have extended the listbox control:

public class ExListBoxScrolling : ListBox
[...]
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_VSCROLL)
{
// will be put in the scrolling event args
this.vScrollV = GetScrollPos(this.Handle, 1);
// will be put in the scrolling event args
this.message = m;

this.listBoxScrolled();
}

base.WndProc (ref m);
}
[...]

And every time this event is called, I execute the following:
PostMessage(handleFromListView, m.Msg, m.WParam, IntPtr.Zero);

This code is working if the user only clicks on the little arrows to scroll
up and down!
But if the user drags the thumb or clicks beside the thumb to make a large
change,
neither the listviewContent gets updated correctly nor is the thumb from the
listview set correct.

Has anyone an idea?
Searching the internet, I often found (SB_THUMBPOSITION + 0x10000 *
postion) instead of m.WParam as a PostMessage parameter but that is not
working for me!!??

Thanks really a lot for any help!
Greetings,
Tim.

P.S.: Is it possible to scroll the listview without showing the scrollbars?