Mouse Scroll Extended Display

Question

Hi everyone!

I am a newbie to VBA Excel. Somehow I managed to build a spreadsheet application and I am using a couple of userform with ComboBox and ListBox. I am using this brilliant piece of code to scroll through the Combo/List boxes I found in this thread

https://social.msdn.microsoft.com/Forums/en-US/7d584120-a929-4e7c-9ec2-9998ac639bea/mouse-scroll-in-userform-listbox-in-excel-2010?forum=isvvba

but I am not sure I am using the latest update as when I am running the spreadsheet on the extended display the functionality does not work.

Has anyone experienced this? Any idea how to fix it?

Many thanks for your suggestions :)