Design DataGridView using windows application

i am developing a application using data grid view in windows application using c sharp.

in the data   grid view rows and columns are there. that is filled in the data grid view no problem.


in the data  grid view i am using combo box when i click the combo box and select the particular item that item is displayed in the cell.


similarly using that  the same combo box when i select the any  item  that item to be displayed  in  the   any rows  in that data grid view.

how to do.please send the code.


Regards,
Rao.