DataGrid VerticalScrollbar always visible causing problem

[Shravan]

Hi,
I have a custom datagrid extended from .Net datagrid,
where I want vertical scrollbar to be visible always, for
that I handled visiblechanged of VerticalScrollbar and
making it visible whenever it is made invisible. As far as
this, it is OK, ther vertical scrollbar is visible always.
But the problem comes when I am horizontally scrolling
the grid, it scrolls only to the area where the last
column is being overlapped by the vertical scrollbar for
the vertical scrollbar width (16 pixels), it's not
scrolling the last data behind the vertical scrollbar,
it's not considering the vertical scrollbar area as the
system area.
Anybody please help.

Thanks in Advance,
Shravan.