obout PageIndex

Question

I'm using an obout grid and I wanted to know, what is the obout equivalent to PageIndex?

For example, using Visual Studio's GridView, I would say:

if (Session["PageIndex"] != null && !string.IsNullOrEmpty(Session["PageIndex"].ToString())) Grid1.PageIndex= (int)Session["PageIndex"];

However; obout doesn't have a property called "PageIndex". What would be the equivalent?