Compare two worksheet ranges using VBA in Microsoft Excel





VBA macro tip contributed by Erlandsen Data Consulting offering Microsoft Excel Application development, template customization, support and training solutions With the macro below it is possible to compare the content of two worksheet ranges.
The result is displayed in a new workbook listing all cell differences.

Sub CompareWorksheetRanges(rng1 As Range, rng2 As Range)
Dim r As Long, c As Integer
Dim lr1 As Long, lr2 As Long, lc1 As Integer, lc2 As Integer
Dim maxR As Long, maxC As Integer, cf1 As String, cf2 As String
Dim rptWB As Workbook, DiffCount As Long
    If rng1 Is Nothing Or rng2 Is Nothing Then Exit Sub
    If rng1.Areas.Count > 1 Or rng2.Areas.Count > 1 Then
        MsgBox "Can't compare multiple selections!", _
            vbExclamation, "Compare Worksheet Ranges"
        Exit Sub
    End If
    Application.ScreenUpdating = False
    Application.StatusBar = "Creating the report..."
    Set rptWB = Workbooks.Add
    Application.DisplayAlerts = False
    While Worksheets.Count > 1
        Worksheets(2).Delete
    Wend
    Application.DisplayAlerts = True
    With rng1
        lr1 = .Rows.Count
        lc1 = .Columns.Count
    End With
    With rng2
        lr2 = .Rows.Count
        lc2 = .Columns.Count
    End With
    maxR = lr1
    maxC = lc1
    If maxR < lr2 Then maxR = lr2
    If maxC < lc2 Then maxC = lc2
    If lr1 <> lr2 Or lc1 <> lc2 Then
        If MsgBox("The two ranges you want to compare are of different size!" & _
            Chr(13) & "Do you want to continue anyway?", _
            vbQuestion + vbYesNo, "Compare Worksheet Ranges") = vbNo Then Exit Sub
    End If
    DiffCount = 0
    For c = 1 To maxC
        Application.StatusBar = "Comparing cells " & _
            Format(c / maxC, "0 %") & "..."
        For r = 1 To maxR
            cf1 = ""
            cf2 = ""
            On Error Resume Next
            cf1 = rng1.Cells(r, c).FormulaLocal
            cf2 = rng2.Cells(r, c).FormulaLocal
            On Error GoTo 0
            If cf1 <> cf2 Then
                DiffCount = DiffCount + 1
                Cells(r, c).Formula = "'" & cf1 & " <> " & cf2
            End If
        Next r
    Next c
    Application.StatusBar = "Formatting the report..."
    With Range(Cells(1, 1), Cells(maxR, maxC))
        .Interior.ColorIndex = 19
        With .Borders(xlEdgeTop)
            .LineStyle = xlContinuous
            .Weight = xlHairline
        End With
        With .Borders(xlEdgeRight)
            .LineStyle = xlContinuous
            .Weight = xlHairline
        End With
        With .Borders(xlEdgeLeft)
            .LineStyle = xlContinuous
            .Weight = xlHairline
        End With
        With .Borders(xlEdgeBottom)
            .LineStyle = xlContinuous
            .Weight = xlHairline
        End With
        On Error Resume Next
        With .Borders(xlInsideHorizontal)
            .LineStyle = xlContinuous
            .Weight = xlHairline
        End With
        With .Borders(xlInsideVertical)
            .LineStyle = xlContinuous
            .Weight = xlHairline
        End With
        On Error GoTo 0
    End With
    Columns("A:IV").ColumnWidth = 20
    rptWB.Saved = True
    If DiffCount = 0 Then
        rptWB.Close False
    End If
    Set rptWB = Nothing
    Application.StatusBar = False
    Application.ScreenUpdating = True
    MsgBox DiffCount & " cells contain different formulas!", _
        vbInformation, "Compare Worksheet Ranges"
End Sub

This example macro shows how to use the macro above:

Sub TestCompareWorksheetRanges()
    ' compare two ranges in the active worksheet in the active workbook
    CompareWorksheetRanges Range("A1:A100"), Range("B1:B100")
    ' compare two ranges in two different worksheets in the active workbook
    CompareWorksheetRanges Worksheets(1).Range("A1:A100"), _
        Worksheets(2).Range("B1:B100")
    ' compare two ranges in two different worksheets in two different workbooks
    CompareWorksheetRanges ActiveWorkbook.Worksheets(1).Range("A1:A100"), _
        Workbooks("WorkBookName.xls").Worksheets(1).Range("B1:B100")
End Sub


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