Excel VBA Tutorial – #3 Running Recorded Macros Step-by-step

Last updated on November 5, 2018 By

Summary: Don’t you just hate it when you run a recorded macro and it works so fast you can’t see what it’s doing? Especially when it does something you don’t want it to… why did it do this or that on the sheet? I’ve been there and know the struggle… so I’m going to share some handy tips in this tutorial about running a macro step-by-step to avoid this feeling!

Difficulty: Beginner

Download the Sample Workbook

Download the sample file with VBA code

Stepping_Into_Macros (81 Kb)

#1 – Why it’s great to “Step Into” macros

I’m sure you remember the previous article about Macro Recording. There I mentioned the option where you can “Step into” the macro instead of just running it from start to end.

This option is going to be one of your favorite functions in VBA programming. Why do I say that? Because it’s my own experience – this is the best method to understand and debug your code!

You can save a lot of time by analyzing your code step-by-step only once … much better than running the whole macro again and again a thousand times and trying to figure out why it goes bad.

Don’t let this picture confuse you – it’s from the previous tutorial article. You don’t need these “Recording1” and “Recording2” macros now.

We are going to record new macros that suit our needs better.

#2 – Record two new macros to play back

Macro 1 – Exponentiation

Let’s start with a simple math function macro recording. I took exponentiation as example, but it really could be anything else: adding, subtraction, writing text, etc.

The purpose is purely to populate cells one after another, to observe the “stepping” function in the code.

You can download a workbook with the macro inside it here:

Stepping_Into_Macros (81 Kb)

Or if you prefer to copy/paste the code here it is:

Sub Exponentiation()

    ActiveCell.FormulaR1C1 = "base"
    ActiveCell.FormulaR1C1 = "1"
    Selection.AutoFill Destination:=Range("A2:A7"), Type:=xlFillSeries
    ActiveCell.FormulaR1C1 = "exponent"
    ActiveCell.FormulaR1C1 = "2"
    ActiveCell.FormulaR1C1 = "result"
    ActiveCell.FormulaR1C1 = "=RC[-2]^R2C[-1]"
    Selection.AutoFill Destination:=Range("C2:C7")
End Sub

As you can see, I recorded the whole macro, and the only thing I changed was replacing the green comments under the title. I don’t need them, because the title tells me it’s function.

That’s something I recommend to you as well: name your macros so that their titles tell you their function! Otherwise, you can find yourself in a VBE maze with no exit from strangely named macros

The code is a simple math example I made using the “pull down” function of Excel. This created the “Selection.AutoFill” lines.

I think the picture of the result speaks more than the code…
… Column A has numbers 1 – 6 (this is the base).
… Column B has the exponent: 2.
… Column C has the result (1^2 = 1, 2^2 = 4, 3^2 = 9 etc.)

Macro 2 – Cleaner

Now, if we need a clear sheet to test the macro again, how can we delete these values?

We could do it manually of course, but that’s not why we’re learning Visual Basic.

I would rather record another “Cleaner” macro, that does the work instead of me! Here’s the code I recorded:

Sub Cleaner()

End Sub

How does this work?

Let’s find out by stepping into this macro!

Download and open up the “Stepping_Into_Macros.xlsm” file, click on the button Macros. Select “Cleaner”, and click on “Step into”.

This happens:

The title turns yellow, meaning that this command is going to be executed when you press “F8”. Actually the title isn’t a real command, so it is just a sign for you that this particular macro is going to be stepped into.

Now, press “F8”.

The next command, “Cells.Select” turns yellow – it is marked for execution on your next “F8” press.

You can see that the yellow line is NOT executed yet. It is waiting for you to continue with F8.

So let’s step again. Press “F8”.

What happened?

The next line turns yellow, yes, but what about the previous command? Well, it is executed: all cells on our sheet got selected, as the picture shows:

One more thing happened along with the selection – the next command in VBE turns yellow.

This is the “Selection.ClearContents” line.

Now we are making progress here, the interesting stuff is going to happen now. Press “F8” again, and notice that all values got deleted from the sheet.

The last command line of the Cleaner macro will select Cell A1.

And if you press “F8” two more times, the macro will be finished. You don’t get any message about a successful macro run, so you should be aware when a macro is stepped until the end.

Why do I say that? Because otherwise you risk that pressing an extra “F8” restarts the macro! For this macro it’s not a big deal, but later on with more complex macros it could cause you a headache.

Keep this in mind: you cannot undo any macro command with Excel’s “Undo” button!

Related Pro Tip:

If you are designing a program in the VBE and you run your code many times for testing purposes, you should always consider using a “Cleaner” macro.

It will save you a LOT of time when you don’t have to “Undo” the actions manually. As you can’t rely on Excel “Undo” function, and you need a blank sheet every time, this is a must have!

Why can’t we use the “Undo” function on macros? Because they are all being processed by the Visual Basic Editor, therefore they are not stored in Excel’s memory. If you want to undo macro actions, you have to use another macro for it, that does the opposite – or works as a cleaner.

#3 – Your turn to use “Step Into”

By now you should be able to run the exponentiation macro. Try it out, I’m sure you are going to like watching the values appearing on the sheet!

I will give you some useful tips that can make your life easier:

  • Stepping into a macro always results in slower code execution. The cause of this is that the processor always stops to wait for the “F8” keystroke. If you run a macro normally, the processing happens significantly faster.
  • Do not click on the sheet while you are stepping a macro! It complicates things, because if you change the active cell, you get totally different results from what you would expect. The best option is not to do anything in Excel, except pay attention to what’s happening.
  • If you bump into any unwanted events while stepping into the macro, and you want to correct it right away, you should first stop and reset the macro! You can do this using the button circled in red:

#4 – Summary

You have been introduced to the macro stepping function – one of the most valuable functions in the Visual Basic Editor.

I’m not kidding, this is my favorite tool when I need to debug my code. It is reliable, makes the code easy to follow, and the process just flows in front of your eyes!

The importance of stepping is this: when you don’t understand why your code doesn’t do what you expect from it, just run it step-by-step, and you will surely find the reason!

Don’t be a fool and think that this is a beginners thing only – professional developers use it every day to debug their programs too.

#5 – About the Author

Daniel Lajosbanyai – I work as a controller and accountant for a company with a bunch of international subsidiaries. In my daily job I work A LOT with Excel and my tasks are quite repetitive (and sometimes boring!)

To boost my processes and spare some time and energy, I started learning Excel Macros. My first teacher was a university professor, who showed me how to get started. I am really thankful to him, because without this knowledge I might have quit my job years ago.

Now I enjoy writing macros for every task I can automate and feel really happy to have learned this skill! Why should we do repetitive things, when our computers can do them quicker for us? We only need to learn how to give them instructions to follow!

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