Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, 2016, 2019, and Excel in Office 365. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Self-Deleting Macros.

Self-Deleting Macros

by Allen Wyatt
(last updated May 25, 2019)

2

Patrick is writing a macro, and he wants the macro to delete itself after a specific expiration date is reached. There are a couple of ways that this task can be approached. First, you could write a macro that would only function before a specific date, in the following manner:

Sub MyMacro()

    ExpirationDate = #1/1/2020#
    If Now() < ExpirationDate Then

        'Rest of macro goes here

    End if
End Sub

The idea is that if (in this case) the current date is prior to January 1, 2020, then the main body of the macro will execute. If it is January 1 or later, then the macro will not execute. This approach, of course, does not actually delete the macro; it simply checks to see that the macro is being executed before a certain date.

To actually get rid of the macro code, you need to take a different approach:

Private Sub Workbook_Open()
    Dim VBComp As VBIDE.VBComponent
    Dim VBComps As VBIDE.VBComponents

    'Delete if Past Date
    If Date >= #1/1/2020# Then
        Set VBComps = ActiveWorkbook.VBProject.VBComponents

        For Each VBComp In VBComps
            Select Case VBComp.Type
                Case vbext_ct_StdModule, vbext_ct_MSForm, _
                  vbext_ct_ClassModule
                    VBComps.Remove VBComp
                Case Else
                    With VBComp.CodeModule
                        .DeleteLines 1, .CountOfLines
                    End With
            End Select
        Next VBComp
    End If

    Set VBComps = Nothing
    Set VBComp = Nothing
End Sub

This code was adapted from a macro originally written by Chip Pearson, available on his site at the following address:

http://www.cpearson.com/excel/vbe.aspx

To make the macro work, you'll need to make sure that there is a reference to Microsoft Visual Basic for Applications Extensibility. (You do this by choosing, in the VB Editor, Tools | References and then choosing Microsoft Visual Basic for Applications Extensibility in the available references.)

The macro runs when the workbook is opened and, if the date is greater than or equal to January 1, 2020, then each component of the VBProject is deleted. This means that the macro is very powerful, because it deletes everything, not just a single procedure or module.

There are a couple of things to keep in mind with this macro, of course. First, if the user chooses to not enable macros when the workbook is opened, then this code will never run, and the macro won't be deleted. Second, deleting macros in this way obviously introduces changes to the workbook. That means that when the workbook is closed, the user will be asked if they want to save their changes. If they choose not to, then the deletions will not be saved, and the macro will again run the next time the workbook is opened.

Note:

If you would like to know how to use the macros described on this page (or on any other page on the ExcelTips sites), I've prepared a special page that includes helpful information. Click here to open that special page in a new browser tab.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (12812) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, and Excel in Office 365. You can find a version of this tip for the older menu interface of Excel here: Self-Deleting Macros.

Author Bio

Allen Wyatt

With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He is president of Sharon Parq Associates, a computer and publishing services company. ...

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What is 2 + 9?

2019-05-28 04:52:12

Ken Varley

"when the workbook is closed, the user will be asked if they want to save their changes" ........ a RUN_ONCE routine could be added to automatically save the workbook immediately after the code was deleted.


2019-05-25 10:40:28

Aldo Santolla

Nice. Can this be applied to add or modify a macro?


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