Passwortgeschützte Excel Dateien bearbeiten VBA Makro

Sub makro_filename()
    Dim MyPath As String, FilesInPath As String
    Dim MyFiles() As String, Fnum As Long
    Dim mybook As Workbook
    Dim CalcMode As Long
    Dim sh As Worksheet
    Dim ErrorYes As Boolean
   
    MyPath = "irgendeinpfad"  
    
    'If there are no Excel files in the folder exit the sub  
    FilesInPath = Dir(MyPath & "*.xl*")  
    If FilesInPath = "" Then  
        MsgBox "Keine Dateien gefunden"  
        Exit Sub
    End If
    'Fill the array(myFiles)with the list of Excel files in the folder  
    Fnum = 0
    Do While FilesInPath <> ""  
        Fnum = Fnum + 1
        ReDim Preserve MyFiles(1 To Fnum)
        MyFiles(Fnum) = FilesInPath
        FilesInPath = Dir()
    Loop
    'Change ScreenUpdating, Calculation and EnableEvents  
    With Application
        CalcMode = .Calculation
        .Calculation = xlCalculationManual
        .ScreenUpdating = False
        .EnableEvents = False
    End With
    'Loop through all files in the array(myFiles)  
    If Fnum > 0 Then
        For Fnum = LBound(MyFiles) To UBound(MyFiles)
            Set mybook = Nothing
            On Error Resume Next
            Set mybook = Workbooks.Open((MyPath & MyFiles(Fnum)), , , , Password:="password")  
            
            On Error GoTo 0
            If Not mybook Is Nothing Then

                'Change cell value(s) in all worksheets in mybook  
    On Error Resume Next
    For Each sh In mybook.Worksheets
        If sh.ProtectContents = False Then
            With sh
        
                .PageSetup.LeftFooter = "Form-Nr. " & mybook.Name  
                .Range("A7:I11").Interior.Color = RGB(224, 224, 224)  
      
                ' change footer in every worksheet  
                
            End With
        Else
            ErrorYes = True
        End If
    Next sh

                If Err.Number > 0 Then
                    ErrorYes = True
                    Err.Clear
                    
                    'Close mybook without saving  
                    mybook.Close savechanges:=False
                Else
                    'Save and close mybook  
                    mybook.Close savechanges:=True
                End If
                On Error GoTo 0
            Else
                'Not possible to open the workbook  
                ErrorYes = True
            End If
        Next Fnum
    End If
    If ErrorYes = True Then
        MsgBox "There are problems in one or more files, possible problem:" _  
             & vbNewLine & "protected workbook/sheet or a sheet/range that not exist"  
    End If
    'Restore ScreenUpdating, Calculation and EnableEvents  
    With Application
        .ScreenUpdating = True
        .EnableEvents = True
        .Calculation = CalcMode
    End With
End Sub