如何在Winform的数据网格视图中为DataGridViewComboBoxColumn创建事件处理程序

I have a DataGridViewComboBoxColumn in a data grid view. I have attached a list as a data source . Now i need to fire an event based on the selected index of the combobox..How can I go aboout doing it ? Thanks in AdvanceI have a DataGridViewComboBoxColumn in a data g