How to Compare two Excel sheets cell by cell

''This code will open two excel sheet and compare each sheet cell by cell, if any changes there in cells , it will highlight the cells in red color in the first sheet.

Set objExcel = CreateObject(“Excel.Application”)
objExcel.Visible = True
Set objWorkbook1= objExcel.Workbooks.Open(“C:\Users\sgajre\Desktop\ListOfTopics1.xls”)
Set objWorkbook2= objExcel.Workbooks.Open(“C:\Users\sgajre\Desktop\ListOfTopics2.xls”)
Set objWorksheet1= objWorkbook1.Worksheets(1)
Set objWorksheet2= objWorkbook2.Worksheets(1)
For Each cell In objWorksheet1.UsedRange
If cell.Value <> objWorksheet2.Range(cell.Address).Value Then
'Highlights in red color if any changes in cells
cell.Interior.ColorIndex = 3
Else
cell.Interior.ColorIndex = 0
End If
Next
set objExcel=nothing