Sub Highlight()
Dim oRng As Word.Range
Set oRng = ActiveDocument.Range
With oRng.Find
.Text = "[0-9]{1,}"
.MatchWildcards = True
While .Execute
Select Case oRng.Start
Case 0
oRng.HighlightColorIndex = wdBrightGreen
Case 1
If Not oRng.Characters.First.Previous.Text Like "M" Then
oRng.HighlightColorIndex = wdBrightGreen
End If
Case Else
If Not oRng.Characters.First.Previous.Text & oRng.Characters.First.Previous.Previous.Text Like "MC" Then
If Not oRng.Characters.First.Previous.Text Like "[C,M]" Then
oRng.HighlightColorIndex = wdBrightGreen
End If
End If
End Select
Wend
End With
lbl_Exit:
Exit Sub
End Sub