I need to know a code that will automatically:-

1. search a specific word in excel
2. notes it row or column number (depends on data arrangement)
3. searches numerical type values in the respective row or column
4. with that numeric value(suppose a[7][0]or a[0][7]) it compares all other values of respective row or column(ie. a[i][0] or a[0][i])
5. sets that value to the highest value only if IT HAS GOT NO FORMULA FOR DERIVATION

i know most of coding but at a few places i got myself stuck...

i'm writing a part of my program upto which i know:

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.IO;
 using System.Threading;
 using Microsoft.Office.Interop;
 using Excel = Microsoft.Office.Interop.Excel; 
 Excel.Application oExcelApp;

 namespace a{
 class b{
 static void main(){
 try
  {

oExcelApp = (Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application"); ;
if(oExcelApp.ActiveWorkbook != null)
{Excel.Workbook xlwkbook = (Excel.Workbook)oExcelApp.ActiveWorkbook;
Excel.Worksheet ws = (Excel.Worksheet)xlwkbook.ActiveSheet;

Excel.Range rn;
rn = ws.Cells.Find("maximum", Type.Missing, Excel.XlFindLookIn.xlValues, Excel.XlLookAt.xlPart,Excel.XlSearchOrder.xlByRows, Excel.XlSearchDirection.xlNext, false, Type.Missing, Type.Missing);

    }}}

now ahead of this i only know tat i have to use cell.value2 ,cell.hasformula methods.....

& no more idea

can any one help me with this..