private void incidentsDataGridView_CellContentClick(object sender, DataGridViewCellEventArgs e) { if (e.ColumnIndex == 6) { int i = e.RowIndex; DataGridViewRow row = incidentsDataGridView.Rows[i]; DataGridViewCell cell = row.Cells[0]; int customerID = (int)cell.Value; Form customerForm = new frmCustomer(); customerForm.Tag = customerID; customerForm.ShowDialog(); } }