The variable CurrentRow indicates one row of that particular DataTable. So, for each iteration, the rows are called one by one.
Syntax: CurrentRow(index).ToString
Here, index indicates the column number.
So, the starting index would be 0 which indicates the values present in the Column A and sameway for Column B the index will be 1
If your value is present in the 4th column, the CurrentRow(3).ToString
Regards,
@90s_Developer