Stop the mahem! The VBA Windows collection changes each time you activate a new windows. How to get some sense back!

Ok Рso this guy give me the one tip that mattered. Application.Windows(1) is the active window. ALSO Рyou can change the caption of the window. IF you have a workbook and need to show  2 or more worksheets in as many windows Рthen it renames the sheets and adds :1 and :2 Рwhich DO NOT CHANGE. But the windows(1) is NOT reliably window(1) the next time you interact with the windows.

So if you want sheet1’s window to return sheet1 and sheet2’s window to interact with sheet2 – then here is some code to help one understand what is going on. What I am going to do is change the :1 to :DELTA and :2 to :SOURCE and ensure that those windows show the delta and source worksheets respectively

Sub Test_WindowIndexes()
' Here is the guy to inspired me to fiddle and get some understanding. It is mental but
' there is some hope is his bottom line.

' before you run this - make a workbook with 2 worksheets
' rename them something memorable

' Next - simply make a new window . Use hte View Ribbon->New Window button
' or Set mywb = workbook.newWindow command here in VBA (in future)

Debug.Print "*********************new" ' just a line so you can see what
'is going on between running this and loooking in the immediate window

Debug.Print "activesheet: " & ActiveSheet.Parent.Windows(1).Caption
ActiveSheet.Parent.Windows(1).Caption = VBA.Replace(ActiveSheet.Parent.Windows(1).Caption, ":1", ":DELTA")
Dim vvar As Variant
Dim w As Window

' lets set aside some static instances of the windows as they are right now
Dim winds As New Collection
winds.Add ActiveSheet.Parent.Windows(1) ' the active screen
winds.Add ActiveSheet.Parent.Windows(2) ' some random worksheet

' lets cycle through the worksheets.
' Set a breakpoint AFTER the Next - play with the windows and re-run this loop.
' the collection CHANGES INDEXES - how unstable!
For Each vvar In ActiveSheet.Parent.Windows
Set w = vvar
Debug.Print "collection: " & w.Caption & " --> " & w.ActiveSheet.Name

' now let VBA muck with the active window
Debug.Print ".windows(1):" & Application.Windows(1).Caption
Debug.Print "w1:" & winds(1).Caption
Debug.Print "w2:" & winds(2).Caption

Debug.Print " ... now switch to winds(2) as active"
Debug.Print ".windows(1):" & Application.Windows(1).Caption
Debug.Print "w1:" & winds(1).Caption
Debug.Print "w2:" & winds(2).Caption

' wind(1) and winds(2) are finally static and no longer dependant on windows(1)
' got a solution now. How mental is this!? Perhaps this was out the Excel Team's area
' of control. The Excel team would not have let this mahem propagte.

End Sub

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