To highlight the vowels in a document, try something like:
Code:
Sub HilightVowels()
Application.ScreenUpdating = False
With ActiveDocument.Range
.HighlightColorIndex = wdYellow
With .Find
.ClearFormatting
.Forward = True
.Wrap = wdFindContinue
.Format = True
.MatchWildcards = True
.Text = "[!AEIOUaeiou]"
With .Replacement
.ClearFormatting
.Highlight = False
.Text = "^&"
End With
.Execute Replace:=wdReplaceAll
End With
End With
Application.ScreenUpdating = True
End Sub