What is this context menu and how can I remove it, please?

[Batbloke]

Hi all
In my vba macro I have set it so only certain cells can be selected (the ones within the brown border)
I have turned off cell right-click context menu
I have disabled drag and drop etc. (Application.CellDragAndDrop = False)
I thought I had unwanted user-mouse fiddling cracked, until (acting as a user would), I selected two (or more) cells that contained data (strings in this case).

Then this little beastie appeared at the bottom-right edge of the selection:

Clicking on it, produced this:

I can't seem to find a reference to it anywhere, but not knowing what it's called doesn't help.
How can I prevent this from appearing please?
The sheet is locked, with only Select unlocked cells selected
I have also set the scroll area:
goXsTT.ScrollArea = "C3:" & UTColumnNumToAlpha(giTableEWColQty + 2) & _
Trim(CStr(giTableNSRowQty + 2))
Tip: Setting the scroll area also makes cells outside of that area un-selectable

Appreciate any help, thanks in advance.

 

[Batbloke]

I'm still none the wiser, but I've found that including ActiveCellOffset(0, 0) stops that potential wrecker from appearing.
I'd still like to know what it's called please and how to properly turn the thing off, note that NONE of the Options, advanced or otherwise make any difference.

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
    If frmTerrain.Visible = True Then
        frmTerrain.cmdLay.Picture = LoadPicture(gsGeneralImagePath & "SW.jpg")
        frmTerrain.cmdLay.Enabled = True
        frmTerrain.chkOverlay.Enabled = True
        ActiveCell.Offset(0, 0).Activate
    End If
End Sub

Microsoft Excel 365 VBA v7.1

 

[Domenic]

You can disable the quick analysis tool as follows...

File >> Options >> General >> uncheck 'Show Quick Analysis Options on Selection'

Hope this helps!

 

[Batbloke]

You can disable the quick analysis tool as follows...

File >> Options >> General >> uncheck 'Show Quick Analysis Options on Selection'

Hope this helps!

Many thanks! That must have been the one and only option checkbox I didn't try. Now knowing what it is called, I've found the application code:

Application.ShowQuickAnalysis = False

Again, many thanks. DG