xlWorkSheet.Cells.Replace("SenderName", dtSender.Rows[0]["senderName"].ToString(), _
missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);

xlWorkSheet.Cells.Replace("SenderCompanyName", dtSender.Rows[0] _
["senderCompanyName"].ToString(), missingValue, missingValue, _
missingValue, missingValue, missingValue, missingValue);

xlWorkBook.PrintOut(1, 1, 1, false, misValue, misValue, misValue, misValue);

xlWorkBook.Close(false, misValue, misValue);