Fortran 77 : Recherche d'un emplacement de fichier

Sub extraction()

 Dim TXT As String
 Dim TextLine As String
 
 Filename = Worksheets("feuil1").Range("C8") & "\TF_actor.f"
 Filename2 = Worksheets("feuil1").Range("C9")
 
 
 Open Filename For Input As #1 'Ouverture du fichier en lecture.

  Do While Not EOF(1)
  
    Line Input #1, TextLine 'Lecture de la ligne
    
    Encode_UTF8 (TextLine)
    
    If InStr(TextLine, "Chemin =") <> 0 Then
    TXT = TXT & AjouterText() & vbCrLf 'Si le test est concluant j'ajoute mes valeurs
    GoTo 10
    End If
    
    
    TXT = TXT & TextLine & vbCrLf 'Je concatène mon texte
    
    Decode_UTF8 (TXT)
    
10:   Loop
  
 Close #1

 Open Filename2 For Output As #1 'Ouverture du fichier en écriture.
 Print #1, TXT 'Je stock dans mon fichier la variable TXT
 Close #1
 
End Sub


Function AjouterText() As String

AjouterText = AjouterText & "Chemin = " & Worksheets("feuil1").Range("C9")

End Function

Public Function isUTF8(astr)
    Dim c0, c1, c2, c3
    Dim n
 
    isUTF8 = True
    n = 1
    Do While n <= Len(astr)
        c0 = Asc(Mid(astr, n, 1))
        If n <= Len(astr) - 1 Then
            c1 = Asc(Mid(astr, n + 1, 1))
        Else
            c1 = 0
        End If
        If n <= Len(astr) - 2 Then
            c2 = Asc(Mid(astr, n + 2, 1))
        Else
            c2 = 0
        End If
        If n <= Len(astr) - 3 Then
            c3 = Asc(Mid(astr, n + 3, 1))
        Else
            c3 = 0
        End If
 
        If (c0 And 240) = 240 Then
            If (c1 And 128) = 128 And (c2 And 128) = 128 And (c3 And 128) = 128 Then
                n = n + 4
            Else
                isUTF8 = False
                Exit Function
            End If
        ElseIf (c0 And 224) = 224 Then
            If (c1 And 128) = 128 And (c2 And 128) = 128 Then
                n = n + 3
            Else
                isUTF8 = False
                Exit Function
            End If
        ElseIf (c0 And 192) = 192 Then
            If (c1 And 128) = 128 Then
                n = n + 2
            Else
                isUTF8 = False
                Exit Function
            End If
        ElseIf (c0 And 128) = 0 Then
            n = n + 1
        Else
            isUTF8 = False
            Exit Function
        End If
    Loop
End Function


Public Function Encode_UTF8(astr)
    Dim c
    Dim n
    Dim utftext
 
    utftext = ""
    n = 1
    Do While n <= Len(astr)
        c = AscW(Mid(astr, n, 1))
        If c < 128 Then
            utftext = utftext + Chr(c)
        ElseIf ((c >= 128) And (c < 2048)) Then
            utftext = utftext + Chr(((c \ 64) Or 192))
            utftext = utftext + Chr(((c And 63) Or 128))
        ElseIf ((c >= 2048) And (c < 65536)) Then
            utftext = utftext + Chr(((c \ 4096) Or 224))
            utftext = utftext + Chr((((c \ 64) And 63) Or 128))
            utftext = utftext + Chr(((c And 63) Or 128))
        Else ' c >= 65536
            utftext = utftext + Chr(((c \ 262144) Or 240))
            utftext = utftext + Chr(((((c \ 4096) And 63)) Or 128))
            utftext = utftext + Chr((((c \ 64) And 63) Or 128))
            utftext = utftext + Chr(((c And 63) Or 128))
        End If
        n = n + 1
    Loop
    Encode_UTF8 = utftext
End Function


Public Function Decode_UTF8(astr)
    Dim c0, c1, c2, c3
    Dim n
    Dim unitext
 
    If isUTF8(astr) = False Then
        Decode_UTF8 = astr
        Exit Function
    End If
 
    unitext = ""
    n = 1
    Do While n <= Len(astr)
        c0 = Asc(Mid(astr, n, 1))
        If n <= Len(astr) - 1 Then
            c1 = Asc(Mid(astr, n + 1, 1))
        Else
            c1 = 0
        End If
        If n <= Len(astr) - 2 Then
            c2 = Asc(Mid(astr, n + 2, 1))
        Else
            c2 = 0
        End If
        If n <= Len(astr) - 3 Then
            c3 = Asc(Mid(astr, n + 3, 1))
        Else
            c3 = 0
        End If
 
        If (c0 And 240) = 240 And (c1 And 128) = 128 And (c2 And 128) = 128 And (c3 And 128) = 128 Then
            unitext = unitext + ChrW((c0 - 240) * 65536 + (c1 - 128) * 4096) + (c2 - 128) * 64 + (c3 - 128)
            n = n + 4
        ElseIf (c0 And 224) = 224 And (c1 And 128) = 128 And (c2 And 128) = 128 Then
            unitext = unitext + ChrW((c0 - 224) * 4096 + (c1 - 128) * 64 + (c2 - 128))
            n = n + 3
        ElseIf (c0 And 192) = 192 And (c1 And 128) = 128 Then
            unitext = unitext + ChrW((c0 - 192) * 64 + (c1 - 128))
            n = n + 2
        ElseIf (c0 And 128) = 128 Then
            unitext = unitext + ChrW(c0 And 127)
            n = n + 1
        Else ' c0 < 128
            unitext = unitext + ChrW(c0)
            n = n + 1
        End If
    Loop
 
    Decode_UTF8 = unitext
End Function