Replacing Quoted Text with Italics

In many word processors, an author may call out material with quote marks. For instance, the first time a term is introduced, the author may enclose the term in quote marks. In Word, however, you can call out information with italics. Manually changing quoted material to italics can be very time consuming. The following macro, QuotesToItalics, will check the current paragraph for quoted material. If there is any, it will delete the quotes and change the text between the quotes to italics. If the quote marks are unbalanced (there is an opening or closing quote mark with no corresponding closing or opening quote mark), then the quote mark is ignored and no changes are made. The macro will work with either regular quotes or smart quotes.

Sub QuotesToItalic()
    Dim Redo As Integer, Ptr As Integer, Ptr1 As Integer
    Dim P As String, P1 As String
    If Selection.ExtendMode Then Exit Sub
    Redo = -1
    While Redo
        Selection.StartOf Unit:=wdParagraph, Extend:=wdMove
        Selection.MoveEnd Unit:=wdParagraph
        P = Selection.Text
        Ptr = InStr(P, Chr(34))
        If Ptr = 0 Then Ptr = InStr(P, Chr$(147))
        If Ptr > 0 Then
            Selection.MoveLeft Unit:=wdCharacter, Extend:=wdMove
            Selection.MoveRight Unit:=wdCharacter, Count:=Ptr
            Selection.MoveEnd Unit:=wdParagraph
            P1 = Selection.Text
            Ptr1 = InStr(P1, Chr(34))
            If Ptr1 = 0 Then
                Ptr1 = InStr(P1, Chr$(148))
                EndChar = Chr$(148)
            Else
                EndChar = Chr$(34)
            End If
            If Ptr1 > 0 Then
                Selection.MoveLeft Unit:=wdCharacter, Count:=2, _
                  Extend:=wdMove
                Selection.Delete Unit:=wdCharacter
                Selection.MoveRight Unit:=wdCharacter, _
                  Count:=Ptr1 - 1, Extend:=wdExtend
                Selection.Font.Italic = True
                Selection.MoveRight Unit:=wdCharacter, Extend:=wdMove
                Selection.Delete Unit:=wdCharacter
            Else
                Selection.MoveRight Unit:=wdCharacter, Extend:=wdMove
                Redo = 0
            End If
        Else
            Selection.MoveRight Unit:=wdCharacter, Extend:=wdMove
            Redo = 0
        End If
    Wend
End Sub