Has anybody tried to synchronize two grids that are using the same 'Control Source' ?

I have tried that through the 'DoScroll' method; however, when using the right scroll at a high speed (or dragging the little rectangle to the end) it loses track of where the pointer is -in the "slave" grid-- and provides erroneous information. This, I've been trying to use to emulate the way a spreadsheet with fixed left titles works.
Any help would be appreciated.

Thanks.
ANTONIO LOZADA