Unable to set Application.ScreenUpdating to false - vba

Question

I have some VBA code as follows:
Sub copyData(fromRange as Range, toRange as Range)
Application.ScreenUpdating = False
<copy paste code here>
Application.ScreenUpdating = True
End Sub
Even though I am setting Application.ScreenUpdating to False, it remains at True. I have verified this using F8 and hovering over Application.ScreenUpdating (it shows True).
My copy paste code works. It switches worksheets but since ScreenUpdating remains at True, I can see the screen flicker.
Is there a way to set Application.ScreenUpdating to False?
P.S. I saw a similar question in this forum but there was no concrete resolution to it.
Any help will be greatly appreciated!

Answer 1

I've had the same issue for quite a while, and I figured out something: Application.screenUpdating only stays FALSE for how ever long a macro runs. When any macro running stops, it turns True. You can try this:
Sub testApplicationScreenUpdating()
Application.ScreenUpdating = False
Debug.Print "Application screen updating is:" & Application.ScreenUpdating
Application.ScreenUpdating = True
End Sub
if you just run this, it will return in the Immediate window: "Application screen updating is:False"
if you run it step by step, and hover over Applicaiton.ScreenUpdating with your mouse, it will show as "True", even if the Immediate window will show "False".
if you comment out the [Application.ScreenUpdating = True] at the end, and then run [Debug.Print "Application screen updating is:" & Application.ScreenUpdating] separately, it will return true, even if it was not switched to true.

Answer 2

Try this code and see the values for each in the Immediate Window Ctrl+G:
Sub copyData()
Dim r As Boolean
r = Application.ScreenUpdating = False
Debug.Print "'Application.ScreenUpdating' is set to " & r
r = Application.ScreenUpdating = True
Debug.Print "'Application.ScreenUpdating' is set to " & r
End Sub

Answer 3

I use Excel as part of Microsoft 365. I too fought with the screen flickering problem. Although my macro worked, the flickering was very annoying. I tried several approaches and stumbled upon this:
Minimize the second workbook before initiating the macro from the first workbook. For my situation, the screen no longer flickered. I also tried the following code to minimize the second workbook from within VBA. If the second workbook was already minimized, there was no effect. If the second workbook was not minimized, the screen flickered only once - to enable me to minimize the second workbook. Subsequent switching back and forth between workbooks did not introduce any screen flickering.
‘
Filename = "SecondWorkbookName.xlsx"
Windows(Filename).Activate
Application.WindowState = xlMinimized ' Minimize workbook to prevent flickering.
Application.ScreenUpdating = False