The SetCellValue accepts a cell letter/number. You can supply it with whatever value you need. For example, if I needed to write a value to each row, I would use the Counter component from the Toolbox and initialize it to 1 (as the first row in Excel is 1). I would then concatenate the status column letter with the Value property of the Counter via a StringUtils component (it has a method called Concat). The result of which would be "A1" (assuming the status column letter is A) for the first row. When I moved on to the next row, I would simply call the Increment method of the counter to increase its value by 1.