How to Use a Macro to Automate Repetitive Tasks in Excel

If you’re someone who works with numbers, you probably spend a good bit of your day working in Excel. In that case, you’ll know that there are certain tasks you have to do over and over again – like entering the same data into different cells or copying and pasting rows and columns of information. 

Now, wouldn’t it be great if there were a way to automate those tasks so that you could spend less time on them?

Enter: macros, the revolutionary tool for Excellers. With macros, you can record a sequence of keystrokes and mouse clicks that will automatically repeat whenever you run the macro. That means that you can spend less time doing monotonous tasks and more time getting things done. 

What Are Macros?

Macros are a type of automation tool that allows you to record a sequence of keystrokes and mouse clicks. When you run the macro, the recorded sequence will replay automatically, making it easier for you to complete repetitive tasks.

Macros are extremely powerful and can accomplish almost anything you can imagine. As an example of what you can do with a macro, here’s a (very) brief list of things you can do with it:

  • Make use of style and formatting
  • Manipulate words and data
  • Create a connection with a data source (database, text files, etc.)
  • Make a completely new file
  • Any of the aforementioned in any combination, in any sequence

How Do Macros Work?

When you create a macro, Excel records everything that you do while the macro is recording. That includes the keystrokes that you type, the mouse clicks that you make, and even the time that it takes for you to complete each step. When you run the macro, Excel will play back the recorded sequence exactly as it happened when you created the macro.

project scope - project deliverables

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If working remotely proved anything, it’s that there is no longer a stigma or assumption that employees cannot be productive, contributing members of an organization when away from the office. This mindset shift merges with the next trend:  the rise of the contractor workforce. When businesses realize that substantial work can be accomplished outside the office, hiring from outside the organizational boundaries becomes a common theme, too.

Trend 2: The rise of the contractor workforce 

Organizations are shifting to a flexible structure that enables a swift response to change and incorporates freelance workers and remote employees as part of the organizational structure. 

project scope - project milestones

As mentioned before, Excel macros playback from where your mouse pointer is positioned when you hit Run – so if you’re not careful, you could inadvertently run your macro on the wrong data set. To avoid this issue, always make sure that your mouse pointer is in the cell you want your macro to start on before clicking Run.

Add a Button to Run Your Macro

You may utilize a variety of Excel objects as macro buttons. In fact, you can add a macro button to any object on an Excel worksheet.

  1. To create a macro button, you first need to insert a shape into your worksheet. Then, go to the Developer tab and click on the Control Button icon.
  2. This will open up a palette of different shapes that you can choose from. Select the shape you want to use and then draw it onto your worksheet.
  3. After you’ve inserted the shape, right-click on it and select “Assign Macro.”
  4. This will open the Assign Macro dialog box. Select the macro you want to assign to the button and then click on OK.
  5. The macro will now be assigned to your button, and you can press it to run the macro.

How To Customize Your Macro Buttons

  • You can also change the button’s appearance by clicking the Format button. This will open the Format Control dialog box, where you can select a different shape, color, and other formatting options for your button.
  • You can also add text to your button by clicking on the Text Box icon on the Control Button palette. This will insert a text box into your button. Type in the text you want to appear on your button, and then format it as you would any other text box.
  • If you want to change the position of your button, you can do so by clicking on the Arrange button. This will open the Arrange Buttons dialog box, where you can select from various alignment and spacing options.
  • You can also use the Size and Properties buttons to change the size and other properties of your button.

How To Change Macro Security Settings

You might encounter an error when running a macro, telling you that the macro has been disabled. This is because Excel’s Macro security settings have been changed to prevent potentially harmful macros from running.

The steps for changing macro security settings depending on which version of Excel you’re using:

  • Excel 2010 and up: Click on the “File” tab and select “Options.” Then click on “Trust Center.”
  • Excel 2007: Click on the “Office” button and select “Excel Options.” Then click on the “Trust Center” tab.
  • Excel 2003: Click on the “Tools” menu and select “Macro Security.”

From here, you can change the security level for macros. The options are:

  • Disable all macros without notification: This is the most secure option, but it also means that you will not be able to run any macros.
  • Enable all macros with notification: This is less secure than the previous option, but it will allow you to run macros that you trust.
  • Enable all macros (not recommended): This is the least secure option, and we do not recommend using it.

Editing Your Macros

You don’t have to rerecord a macro after you’ve generated it if you want to modify the way it acts. In many circumstances, changing its functionality by merely modifying its contents in Visual Basic Editor (VBA) may be more efficient.

You must first reveal this workbook by clicking on Window>Unhide in the dialog box and choosing PERSONAL.XLS before you can use VBA Editor to alter a macro stored in your Personal Macro Workbook.

Follow these procedures to open a macro in Visual Basic Editor for editing:

  1. First, open the workbook that contains the macro you want to edit.
  2. Then, go to the Developer tab and click on Visual Basic Editor.
  3. This will open up a new window with two panes. The pane on the left is for browsing through the objects in your workbook, while the pane on the right is for viewing the code associated with the object selected in the left pane.
  4. To select a macro for editing, click on it in either of these panes.
  5. If you’re not sure which macro you want to edit, then you can search for it by typing part of its name in the Search text box at the top of each pane.

Editing Macros in VBA

Now that you’ve selected your macro for editing, the next step is to actually edit it. This is where you can change how the macro works by adding or changing code. For example, you could change the way a macro prints data to the screen by adding a statement that clears the screen before printing. You can also use VBA to create entirely new macros.

The possibilities are endless, so be creative and see what you can come up with.

“Basic” Visual Basic Editor (VBA) Codes

If you’re feeling adventurous, you may also want to try creating your own macros with Visual Basic for Applications (VBA), a basic programming language included in Microsoft Office. This can be a great way to automate complex or repetitive tasks in Excel.

project scope - line items

To get started, open up the VBA Editor by pressing Alt+F11. This will open up a new window with a lot of code in it. Don’t worry if you don’t understand any of this code—you don’t need to in order to create macros.

All you need to do is type the following statement in the top-left corner of the window:

  1. Sub MyMacro()

This tells Excel that you’re going to create a new macro called “MyMacro.” Anything that you want your macro to do should go between the parentheses after this statement.

For example, you could add the following line of code to print “Hello, world!” on the screen:

  1. MsgBox “Hello, world!”

This would cause the text “Hello, world!” to pop up on-screen when the macro is running.

You can also use VBA to interact with other objects in your workbook, such as cells and ranges. For example, the following code would print the value of cell A1 to the screen:

  1. MsgBox Range(“A1”).Value

This would cause the text “The value of A1 is: _____” to pop up on-screen when the macro is running.

You can find more information about VBA (including a tutorial) by going to the Microsoft Office website or here at ProsperSpark, we offer 1-on-1 hourly support aimed at answering your questions or providing training.

Conclusion

Macros can be a great way to automate complex or repetitive tasks in Excel. In this article, we’ve shown you how to create and edit macros. We’ve also provided some basic information about Visual Basic for Applications (VBA), a programming language that you can use to create your own macros. Be creative and see what you can come up with!

At ProsperSpark, we eat, sleep, and breathe macros and VBA.  If you’re just exploring how macros function, or if you’re genuinely interested in building your skill set, we are here to help!  Our wide range of services include the 1-on-1 hour session mentioned above to robust and dynamic project creation.  If you’re ready to take your macro game to the next level, we’d love to chat!

In 2010, MI5, the United Kingdom’s domestic counterintelligence agency, made a grave mistake due to a simple spreadsheet formatting error. This blunder resulted in the wrongful surveillance of 134 individuals unrelated to ongoing investigations. On top of this, MI5 also collected the histories of 927 IP addresses without the required senior officer authorization. These mistakes wasted valuable resources and compromised the privacy of those involved. While this incident may sound like a far-fetched spy movie plot, it highlights the ongoing risks of manual data handling in critical operations.

 

The Spreadsheet Error That Led to Wrongful Surveillance

The error occurred during a data entry process where MI5 agents listed phone numbers for surveillance. Unfortunately, a formatting mistake in the Excel spreadsheet caused the last three digits of the phone numbers to be replaced with “000,” leading the agency to tap the wrong phone lines​.

As a result, MI5 unknowingly collected irrelevant data on unsuspecting British citizens. Although the error was discovered and the material destroyed, the incident is a chilling reminder of the consequences that can stem from even minor spreadsheet errors. However, it’s important to note that these errors were entirely preventable with the suitable systems in place, offering a sense of empowerment to organizations that can learn from MI5’s experience.

 

The Broader Risks of Manual Data Entry

The MI5 surveillance mistake is just one example of how spreadsheet errors can have significant implications, and it’s far from an isolated incident. In previous Spreadsheet Horrors blog posts, we’ve covered TransAlta’s $24 Million Copy-Paste Error and JPMorgan’s $6 Billion Trading Loss, both of which stemmed from errors in Excel spreadsheets. These examples from the finance and energy sectors further underscore how human data entry errors can spiral into severe operational failures​.

The risks of manual data entry are not just financial. For organizations like MI5, these errors can threaten national security and compromise public trust. Manual handling of large datasets—phone numbers, financial data, or operational details—carries a high risk of human error, especially when using spreadsheets that lack built-in safeguards.

 

Why Spreadsheets Are a Weak Link

Spreadsheets, while versatile, are prone to errors that can have devastating effects. MI5’s error is a classic case of how even a tiny mistake can lead to large-scale consequences. Spreadsheets cannot detect such errors in real-time, especially when the managed data is complex or critical.

 

Unauthorized Collection of IP Data

In addition to the phone number mistake, MI5 also acquired data on 927 IP addresses without the necessary approval from a senior officer. This unauthorized data collection resulted from a system configuration error that bypassed the established protocol requiring clearance from higher-ranking officials. Although this data request was deemed appropriate, the lack of proper authorization exposed MI5 to operational and legal risks.

These errors underscore the vulnerabilities of manual data management in high-stakes environments. Without proper safeguards, even well-established processes can go awry.

How ProsperSpark Can Help Your Company Prevent Similar Errors

At ProsperSpark, we specialize in helping organizations avoid costly data management mistakes like the ones MI5 experienced. By automating manual processes and implementing robust error detection systems, we enable businesses to handle sensitive data more efficiently and securely.

Automated Validation Rules

One of the critical ways ProsperSpark can help is by implementing automated validation rules. These rules ensure data is correctly formatted and verified before being used in critical operations. For example, in MI5’s case, validation rules could have checked the phone numbers for proper formatting before entering the system, catching the “000” error early. This type of automation drastically reduces the risk of human error in data entry, especially in scenarios where even minor mistakes can have significant consequences.

 Data Auditing and Logging Systems

At ProsperSpark, we also provide data auditing and logging solutions that track all changes made to sensitive datasets. By maintaining an audit trail, organizations can quickly identify and rectify errors. In MI5’s case, this would have allowed the agency to detect the phone number formatting issue and the unauthorized IP data collection before the errors impacted their operations. Data auditing ensures every action is logged and traceable, safeguarding against accidental errors and unauthorized changes.

Automated Workflows for Authorization

To prevent issues like MI5’s unauthorized IP data collection, ProsperSpark configures automated workflows that require the correct authorization at every stage of data handling. These workflows ensure that no action can be completed without the appropriate approval, reducing the risk of bypassing critical security protocols. For organizations dealing with sensitive information, having an automated authorization system is essential for maintaining compliance and avoiding potential legal repercussions.

Tailored Solutions for Data Management

Whether you’re handling sensitive data in intelligence, finance, healthcare, or any other industry, ProsperSpark can help implement tailored data management solutions designed to fit your organization’s specific needs. We provide customized automation solutions that eliminate the reliance on manual spreadsheets, reducing the risk of errors and improving overall operational efficiency.

 

Conclusion

MI5’s 2010 spreadsheet errors are a stark reminder of the risks associated with manual data entry, especially in sensitive operations. Organizations can significantly reduce the likelihood of such mistakes by implementing automated validation, data auditing, and authorization systems. ProsperSpark specializes in helping businesses transition from error-prone manual processes to secure, automated systems that ensure data accuracy and compliance.

 

Don’t let a simple formatting error compromise your operations. Contact ProsperSpark today to learn how we can help you safeguard your data with tailored automation solutions.

 

Keep Reading

MI5 responsible for 1000 bugging errors in 2010 says Guardian

MI5 makes 1,061 bugging errors

EuSPRIG Horror Stories

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