Sub ScratchMacro()
'A basic Word Macro coded by Gregory K. Maxey
Dim oRng As Range
  Set oRng = ActiveDocument.Range
  With oRng.Find
    .Text = "[0-9Oo]{1,}"
    .MatchWildcards = True
    While .Execute
      oRng.Text = Replace(oRng.Text, "O", "0")
    Wend
  End With
lbl_Exit:
  Exit Sub
End Sub