Question:  How can I write an Excel macro that needs to compare data in Cell A2 to A3 and so on until it doesn't find a match? So if there were 100 rows in the sheet and the data in column A for the first 50 were equal, but A51 contained a different value and you wanted to copy the data from A2 through A50 onto a new sheet.

Then the macro would continue comparing the values in column A starting from Cell A51 until a different value was encountered. It would then copy the data into a new sheet, and so on...until all values had been evaluated in column A.

Answer:  You should be able to create a macro that tests each value in column A and checks for differences.

Let's take a look at an example.

Download Excel spreadsheet (as demonstrated below)

In our spreadsheet, we've created a button on the Data sheet called "Copy Data". When the user clicks on this button, a macro called CopyData will run. This macro will analyze each value in column A to search for a different value.

When a different value is found in column A on the Data sheet, the macro will then copy the values in columns A through D up to the different value, and paste to a new sheet.

So in this example, it copies all rows until it reaches the Microsoft value in cell A8 (on the Data sheet) and pastes these values to a new sheet called "Tech on the Net".

The macro then goes back to column A on the Data sheet and continues analyzing the value starting from cell A8.

It then creates another sheet called "Microsoft" and copies the Microsoft data into this new sheet.

When the macro has completed, the above message box will appear.

You can press Alt-F11 to view the VBA code.

Macro Code:

The macro code looks like this:

Sub CopyData()

    Dim LMainSheet As String
    Dim LRow As Integer
    Dim LContinue As Boolean

    Dim LColAMaster As String
    Dim LColATest As String

    'Retrieve name of sheet that contains the data
    LMainSheet = ActiveSheet.Name

    'Initialize variables
    LContinue = True
    LRow = 2

    'Start comparing with cell A2
    LColAMaster = "A2"

    'Loop through all column A values until a blank cell is found
    While LContinue = True

        LRow = LRow + 1
        LColATest = "A" & CStr(LRow)

        'Found a blank cell, do not continue
        If Len(Range(LColATest).Value) = 0 Then
            LContinue = False
        End If

        'Found occurrence that did not match, copy data to new sheet
        If Range(LColAMaster).Value <> Range(LColATest).Value Then

            'Copy headings
            Range("A1:D1").Select
            Selection.Copy

            'Add new sheet and paste headings into new sheet
            Sheets.Add.Name = Range(LColAMaster).Value
            ActiveSheet.Paste
            Range("A1").Select

            'Copy data from columns A - D
            Sheets(LMainSheet).Select
            Range(LColAMaster & ":D" & CStr(LRow - 1)).Select
            Selection.Copy

            'Paste results
            Sheets(Range(LColAMaster).Value).Select
            Range("A2").Select
            ActiveSheet.Paste
            Range("A1").Select

            'Go back to Main sheet and continue where left off
            Sheets(LMainSheet).Select
            LColAMaster = "A" & CStr(LRow)

        End If

    Wend

    Range("A1").Select
    Application.CutCopyMode = False

    MsgBox "Copy has completed."

End Sub