Sub PunctuationToDash()
' Paul Beverley - Version 25.03.23
' Changes next hyphen/em/en dash to an em/en dash

myDash = ChrW(8212) ' em dash
myDash = ChrW(8211) ' en dash

trackIt = True

searchChars = "-~" & ChrW(8211) & ChrW(8212) & ChrW(8722) & Chr(30)

myTrack = ActiveDocument.TrackRevisions
If trackIt = False Then ActiveDocument.TrackRevisions = False
Set rng = Selection.Range.Duplicate

For i = 1 To 1000
  rng.MoveEnd , 1
  If InStr(searchChars, Right(rng, 1)) > 0 Then
    rng.Start = rng.End - 1
    gotChar = True
    Exit For
  End If
  DoEvents
Next i
If gotChar = False Then
  Beep
Else
  rng.Delete
  rng.Select
  Selection.TypeText Text:=myDash
End If
ActiveDocument.TrackRevisions = myTrack
End Sub