internal override IntPtr AfterTopMostControl ()
{
// order of scrollbars:
// top = vertical
// sizegrid
// bottom = horizontal
if (hbar != null && hbar.Visible)
return hbar.Handle;
// no need to check for sizegrip since it will only
// be visible if hbar is visible.
if (vbar != null && vbar.Visible)
return vbar.Handle;
return base.AfterTopMostControl ();
}