Patrick
if you want it update when you change any to any page.you dont need:
If MultiPage.Value = 0 Then

eg:
Private Sub YourMultiPage_Change()
'TextBox handling here

End Sub
for MultiPage2
you don't need more than...if it applies to all pages

Private Sub MultiPage2_Change()
PopulateWorksheets.PopulateWorksheets
End Sub

let me know if I misunderstood...HTH