A new issue has emerged in Microsoft Access Version 2412 (Build 18324.20092 Click-to-Run) that affects users relying on the MouseWheel event. This bug could impact scrolling functionality in various applications.
 

Key Details

Version Affected: Microsoft Access Version 2412 (Build 18324.20092 Click-to-Run)
Issue: The ‘Count’ value in MouseWheel events is reportedly always returning zero (0) instead of -1 (scroll up) and +1 (scroll down). Others are now stating the all Mouse events seems to be impacted beyond just the Count value.
 

A Fix To The Issue

Update 2025-01-22 – A Proper Fix On The Horizon

The Dev Team has just informed us that the fix to this issue will be part of Version 2501.

Update 2025-01-28

The Good news is that people have stated that the update is out, so update your systems and you should get Version 2501 (Build 18429.20044 Click-to-Run) installed.

The BAD news is several people in the discussions and in the Feedback Portal suggestion comments have already stated the update to 2501 did not fix this issue.

Update 2025-01-30

Reports of the Issue

The original report of the issue was made by Ross Story dated 2024-12-26, now others have added their voices to his discussion on the matter, and can be found in the following post on Microsoft Answers:

MouseWheel event no longer working

In MS 365 Version 2412 (Build 18324.20092 Click-to-Run), in Access Forms, the MouseWheel event has changed...

MouseWheel Event stopped working properly

A worrying problem has just occurred in my Access Databases with the mouse wheel events. Private Sub Form_MouseWheel(ByVal Page As Boolean, ByVal Count As Long) End Sub Whether I roll the Mouse Wheel backwards or forwards, Count is always zero. It is supposed to be positive if rolled backwards. It was working a few days ago. I have tried this on other databases that use the Form_MouseWheel event and they all have the same problem. It is not the Mouse, as I swapped it to one that is

MouseWheel event always returning Count=0

Not withstanding, this afternoon the
...
MouseWheel Count is always returning 0, so records always move forward (acNext), and never backward (acPrevious).
...

MS Access Version 2412 Build - VBA to override default form record scrolling behavior no longer works

I have several continuous and single forms and use the following code to override the default record scrolling behavior. With the January 7 MS Office update, nad update to Access Version 2412, the following mouse wheel event code no longer works.

What changed in Version 2412?

Workaround to the Problem

There is no fix to the issue as of yet, but Ross indicates that rolling back to a prior build resolved the issue. So try rolling back your Office installation to version 2411 (Build 18227.20162).

If you’re not familiar with that process, see:

Microsoft Office 365 - Uninstall an Update

With Microsoft’s major push of Office 365, more specifically Click-to-run (C2R or CTR), I think it important to briefly touch base on the entire update process. Do note that the following also applies to the C2R versions of Access 2013, 2016, 2019, 2021+ the only difference being the build numbers. While Office 365 will, unless reconfigured, automatically updates itself based on the Update Channel (you can learn more about Update Channel by reviewing Overview of update channels for Office 365 ProPlus) you have chosen to use (and yes, I too, never made any such choice and was automatically setup on the…

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A Proper Fix

After waiting 2-3 weeks to see if the Dev Team would resolve the issue, I finally decided to create a Feedback Portal suggestion to add the necessary visibility and to request the Dev Team fix this issue. Feel free to add your support by using the link below to view the suggestion in question and then clicking on the Vote button (up arrow).

Fix mouse wheel bug

Please fix the latest bug cause by build 18324.20092 affecting the mouse wheel event and causing it to always return a value of 0.

Refer to the following post for all the details and links to various reports on the subject: https://www.devhut.net/potential-mousewheel-bug-in-microsoft-365-version-2412/

Where’s Microsoft In All Of This? – Update 2025-01-14

We’ve (MVPs that is) been informed that Microsoft will indeed fix this bug in an upcoming version. When exactly is unknown. (January’s Patch Tuesday has already passed, so one can hope, perhaps February’s Patch Tuesday depending on the complexity of the underlying root cause would be my best guess??? Then again, they don’t have to adhere to Patch Tuesday for releasing updates if they don’t want to.)

Sorry, nothing official, not on their blog, not on the Fixes page, not in any forums that I’m aware of.

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