Excel VBA set a filter for a exact filename using MsoFileDia

Private Sub openDialog()
    Dim txtFileName As String
    Dim fd          As Office.FileDialog

    Set fd = Application.FileDialog(msoFileDialogFilePicker)

   With fd

      .AllowMultiSelect = False

      ' Set the title of the dialog box.
      .Title = "Please select the file."

      ' Clear out the current filters, and add our own.
      .Filters.Clear
      .Filters.Add "Excel (macro)", "*.xlsm"
      .Filters.Add "Excel", "*AdminMEDEWERKER.xlsm"
      ' Show the dialog box. If the .Show method returns True, the
      ' user picked at least one file. If the .Show method returns
      ' False, the user clicked Cancel.
      If .Show = True Then
        txtFileName = .SelectedItems(1) 'replace txtFileName with your textbox

      End If
   End With
End Sub

.Filters.Add "Excel","*AdminMEDEWERKER.xlsm"