绑定数据后的Telerik RadGridView事件

I am using telerik library 2011.3.1220.40 in a Windows forms application. My purpose is to add data to a new column based on the data that is already loaded and bound to the view. Is there an event that is triggered after the data is bound? And I don't know why I cannot have access to Rows collection in such example: myGrid.Rows[3]I am using telerik library 2011.3.1220.40 in a