Scrolling A TStringGrid + TDrawGrid Simultaneously

I would like to scroll a TStringGrid and a TDrawGrid simultaneously by
using one of the vert scrollbars (or even better by a Tscrollbar
Yet I have found neither a way to access to the scrollposition of the
grids nor to manipulate the value of the grid scrollbar. Is there any
chance to do so?

Thanks for any help

Volker Engel

TU Mnchen