C# And SQL Query

It looks like this code just creates a data table and iterates through each record to paste into Excel.  What line of the code actually passes the connection string to Excel?

I am working on a solution...please bear with me, and Merry Christmas.

hi
check fallowing code
datatable dt=new datatable();
 Excel.Application xlApp;
                Excel.Workbook xlWorkBook;
                Excel.Worksheet xlWorkSheet;
                object misValue = System.Reflection.Missing.Value;

                xlApp = new Excel.ApplicationClass();
                xlApp.Visible = true;
                xlWorkBook = xlApp.Workbooks.Add(misValue);
                xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
                int i = 0;
                int j = 0;

                for (i = 0; i <= dt.RowCount - 1; i++)
                {
                    for (j = 0; j <= dt.ColumnCount - 1; j++)
                    {
                                dt cell = dt[j, i];
                        xlWorkSheet.Cells[i + 1, j + 1] = cell.Value;
                    }
                }
                //xlWorkBook.SaveAs("csharp.net-informations.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
                xlWorkBook.Close(true, misValue, misValue);
                xlApp.Quit();
                releaseObject(xlWorkSheet);
                releaseObject(xlWorkBook);
                releaseObject(xlApp);