Nested For Loops to Look at 2 ListBoxs in VBA UserForm

Hi All

Happy New Year.  I'm attempting to compare items from one listbox with those in another listbox (both on the same userform).

I appear to be using the wrong approach because ListBoxA stops passing values when I introduce a nested ForLoop to look at ListBoxB.  Code as follows:

For i = 0 To myForm.ListBoxA.ListCount - 1
  myForm.ListBoxA.ListIndex = i
  AItem = myForm.ListBoxA.Value
  MsgBox ("List A: " & AItem)
    
'    For j = 0 To myForm.ListBoxB.ListCount - 1
'    Next j
Next i

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As soon as I uncomment the inner For-Next the MsgBox will not display AItem

This is most alarming!

Cheers, S