Scrollbar in datagrid

Hi

I'm developing a WinForm application for a TouchScreen devive using VB .NET. I'm using a datagrid to display some data and I'd like to increase the size of the vertical scrollbar (width and arrows - necessary on a touchscreen). I'd like to change the color of the scrollbar too.

Any idea how to do it? Do I have to create a custom scrollbar? If yes how to do it?

Thanks in advance

Albert