VBA Macro to open/save/close workbooks in folder and subfolders - excel

Question

I have the following code that will open/save/close any/all workbooks in a folder. It works great, however, I also need it to include sub folders. The code needs to work without restrictions on the number of folders, sub folders and files, if possible.
I'm working with Excel 2010 and I'm new to VBA - would really appreciate any help!
Sub File_Loop_Example()
'Excel VBA code to loop through files in a folder with Excel VBA
Dim MyFolder As String, MyFile As String
'Opens a file dialog box for user to select a folder
With Application.FileDialog(msoFileDialogFolderPicker)
.AllowMultiSelect = False
.Show
MyFolder = .SelectedItems(1)
Err.Clear
End With
'stops screen updating, calculations, events, and statsu bar updates to help code run faster
'you'll be opening and closing many files so this will prevent your screen from displaying that
Application.ScreenUpdating = False
Application.DisplayStatusBar = False
Application.EnableEvents = False
Application.Calculation = xlCalculationManual
'This section will loop through and open each file in the folder you selected
'and then close that file before opening the next file
MyFile = Dir(MyFolder & "\", vbReadOnly)
Do While MyFile <> ""
DoEvents
On Error GoTo 0
Workbooks.Open Filename:=MyFolder & "\" & MyFile, UpdateLinks:=False
ActiveWorkbook.Save
Workbooks(MyFile).Close SaveChanges:=True
MyFile = Dir
Loop
'turns settings back on that you turned off before looping folders
Application.ScreenUpdating = True
Application.DisplayStatusBar = True
Application.EnableEvents = True
Application.Calculation = xlCalculationManual
MsgBox "Done!"
End Sub

Answer 1

For anyone interested, I found an alternative which I managed to adapt and does exactly what I want:
Sub Loop_Example()
Dim MyFolder As String
Dim file As Variant, wb As Excel.Workbook
With Application.FileDialog(msoFileDialogFolderPicker)
.AllowMultiSelect = False
.Show
MyFolder = .SelectedItems(1)
Err.Clear
End With
Application.ScreenUpdating = False
For Each file In Filter(Split(CreateObject("WScript.Shell").Exec("CMD /C DIR """ & startFolder & "*.xl*"" /S /B /A:-D").StdOut.ReadAll, vbCrLf), ".")
Set wb = Workbooks.Open(file)
ActiveWorkbook.Save
wb.Close SaveChanges:=True
Set wb = Nothing
Next
Application.ScreenUpdating = True
MsgBox "Done!"
End Sub