Sub tester1234()
Dim wb As Workbook
Dim ws As Worksheet
Set wb = getOpenWorkbook()
For Each ws In wb.Worksheets
Tabelle5.Cells(Rows.Count, 1).End(xlUp).Offset(1, 0) = ws.CodeName
Next
End Sub
Function getOpenWorkbook() as workbook
Dim my_Filename As Variant
my_FileName = Application.GetOpenFilename(FileFilter:="ExcelFiles,*.xl*;*.csv*;*.xm*;*.xls*")
Debug.Print (my_FileName)
If my_FileName <> False Then
set getOpenWorkbook = Workbooks.Open(Filename:=my_FileName)
End If
End Function