I got the answer on cell content click i made an object of that cell and coded further like.....
Dim oCheck As DataGridViewCheckBoxCell
oCheck = datagrid.CurrentRow.Cells("colunmname")
If oCheck.EditingCellFormattedValue = True Then
For iCount = 0 To datagrid.CurrentRow.Cells.Count - 1
datagrid.CurrentRow.Cells(iCount).Style.BackColor = Color.Teal
Next iCount
Else
For iCount = 0 To datagrid.CurrentRow.Cells.Count - 1
datagrid.CurrentRow.Cells(iCount).Style.BackColor = Color.White
Next iCount
End If