probelm in DataGridView focus in C#

Question

Hello Every One, i have data grid view in Windows Application ok which is bind from database here is some calculation process in datagrid view ok when i select the party from party list then second focus should in 3 cell.or in enter click should be go 4 cell.hope you underdstand what i want dear. if you know about this then let me know ok. Its Just for Focus Work in DataGridView.... tahnks in Advance