Adding paging to SPGridView

oGrid.PageSize = 3;
oGrid.AllowPaging = true;
oGrid.PageIndexChanging += new GridViewPageEventHandler (oGrid_PageIndexChanging);
oGrid.PagerTemplate = null;
// Must be called after Controls.Add(oGrid)
   
 
http://blogs.msdn.com/powlo/archive/2007/03/23/Adding-paging-to-SPGridView-when-using-custom-data-sources.aspx