copying workbooks from current folder and also subfolders - vba

Question

This is part of the sub I found to copy all tabs in all workbooks in a directory to my current workbook, but how can I adjust it to scan all subfolders as well? Currently, it only copies from the folder I select and then stops.
Here's the full code with functions: http://www.vbaexpress.com/kb/getarticle.php?kb_id=829
Sub CombineFiles()
Dim path As String
Dim FileName As String
Dim LastCell As Range
Dim Wkb As Workbook
Dim WS As Worksheet
Dim ThisWB As String
ThisWB = ThisWorkbook.Name
Application.EnableEvents = False
Application.ScreenUpdating = False
path = GetDirectory
FileName = Dir(path & "\*.xls*", vbNormal)
Do Until FileName = ""
If FileName <> ThisWB Then
Set Wkb = Workbooks.Open(FileName:=path & "\" & FileName)
For Each WS In Wkb.Worksheets
Set LastCell = WS.Cells.SpecialCells(xlCellTypeLastCell)
If LastCell.Value = "" And LastCell.Address = Range("$A$1").Address Then
Else
WS.Copy After:=ThisWorkbook.Sheets(ThisWorkbook.Sheets.Count)
End If
Next WS
Wkb.Close False
End If
FileName = Dir()
Loop
Application.EnableEvents = True
Application.ScreenUpdating = True
Set Wkb = Nothing
Set LastCell = Nothing
End Sub

Answer 1

Using the code I posted in the linked question (untested)
Sub CombineFiles()
Dim path As String
Dim FileName As String
Dim LastCell As Range
Dim Wkb As Workbook
Dim WS As Worksheet
Dim ThisWB As String
Dim colFiles As New Collection, fPath
ThisWB = ThisWorkbook.path & "\" & ThisWorkbook.Name
Application.EnableEvents = False
Application.ScreenUpdating = False
path = GetDirectory
GetFiles path, "*.xls*", True, colFiles
For Each fPath In colFiles
If fPath <> ThisWB Then
Set Wkb = Workbooks.Open(FileName:=fPath)
For Each WS In Wkb.Worksheets
Set LastCell = WS.Cells.SpecialCells(xlCellTypeLastCell)
If LastCell.Value = "" And LastCell.Address = Range("$A$1").Address Then
Else
WS.Copy After:=ThisWorkbook.Sheets(ThisWorkbook.Sheets.Count)
End If
Next WS
Wkb.Close False
End If
Next fPath
Application.EnableEvents = True
Application.ScreenUpdating = True
Set Wkb = Nothing
Set LastCell = Nothing
End Sub
VBA macro that search for file in multiple subfolders