Dim FSO As Object, oFolder As Object, StrFolds As String
 
Sub Main()
Dim TopLevelFolder As String, TheFolders As Variant, aFolder As Variant, i As Long
TopLevelFolder = GetFolder
StrFolds = vbCr & TopLevelFolder
If FSO Is Nothing Then
  Set FSO = CreateObject("Scripting.FileSystemObject")
End If
'Get the sub-folder structure
Set TheFolders = FSO.GetFolder(TopLevelFolder).SubFolders
For Each aFolder In TheFolders
  RecurseWriteFolderName (aFolder)
Next
'Process the documents in each folder
For i = 1 To UBound(Split(StrFolds, vbCr))
  Call UpdateDocuments(CStr(Split(StrFolds, vbCr)(i)))
Next
End Sub
 
 
Sub RecurseWriteFolderName(aFolder)
Dim SubFolders As Variant, SubFolder As Variant
Set SubFolders = FSO.GetFolder(aFolder).SubFolders
StrFolds = StrFolds & vbCr & CStr(aFolder)
On Error Resume Next
For Each SubFolder In SubFolders
  RecurseWriteFolderName (SubFolder)
Next
End Sub


Sub UpdateDocuments(oFolder As String)
Application.ScreenUpdating = False
Dim strInFolder As String, strOutFold As String, strFile As String, wdDoc As Document
strInFolder = oFolder
If strInFolder = "" Then Exit Sub
strFile = Dir(strInFolder & "\*.docx", vbNormal)
'Check for documents in the folder - exit if none found
If strFile <> "" Then strOutFold = strInFolder & "\Output\"
'Test for an existing outpfolder & create one if it doesn't already exist
If Dir(strOutFold, vbDirectory) = "" Then MkDir strOutFold
strFile = Dir(strInFolder & "\*.docx", vbNormal)
While strFile <> ""
  Set wdDoc = Documents.Open(FileName:=strInFolder & "\" & strFile, AddToRecentFiles:=False, Visible:=False)
  With wdDoc



' copy the styles
ActiveDocument.CopyStylesFromTemplate ("C:\Users\Terence Yip\AppData\Roaming\Microsoft\Templates\normal.dotm")

' replace headings
    Selection.Find.ClearFormatting
    Selection.Find.Style = ActiveDocument.Styles("Heading 8")
    Selection.Find.Replacement.ClearFormatting
    Selection.Find.Replacement.Style = ActiveDocument.Styles("Heading 5")
    With Selection.Find
        .Text = ""
        .Replacement.Text = ""
        .Forward = True
        .Wrap = wdFindContinue
        .Format = True
        .MatchCase = False
        .MatchWholeWord = False
        .MatchByte = False
        .MatchWildcards = False
        .MatchSoundsLike = False
        .MatchAllWordForms = False
    End With
    Selection.Find.Execute Replace:=wdReplaceAll
    
    Selection.Find.ClearFormatting
    Selection.Find.Style = ActiveDocument.Styles("Heading 7")
    Selection.Find.Replacement.ClearFormatting
    Selection.Find.Replacement.Style = ActiveDocument.Styles("Heading 4")
    With Selection.Find
        .Text = ""
        .Replacement.Text = ""
        .Forward = True
        .Wrap = wdFindContinue
        .Format = True
        .MatchCase = False
        .MatchWholeWord = False
        .MatchByte = False
        .MatchWildcards = False
        .MatchSoundsLike = False
        .MatchAllWordForms = False
    End With
    Selection.Find.Execute Replace:=wdReplaceAll
    
    
        Selection.Find.ClearFormatting
    Selection.Find.Style = ActiveDocument.Styles("Heading 9")
    Selection.Find.Replacement.ClearFormatting
    Selection.Find.Replacement.Style = ActiveDocument.Styles("Heading 6")
    With Selection.Find
        .Text = ""
        .Replacement.Text = ""
        .Forward = True
        .Wrap = wdFindContinue
        .Format = True
        .MatchCase = False
        .MatchWholeWord = False
        .MatchByte = False
        .MatchWildcards = False
        .MatchSoundsLike = False
        .MatchAllWordForms = False
    End With
    Selection.Find.Execute Replace:=wdReplaceAll

    
    End With




    'Save and close the document
    .SaveAs FileName:=strOutFold & .Name, AddToRecentFiles:=False
    .Close
  End With
  
  strFile = Dir()
Wend
Set wdDoc = Nothing
Application.ScreenUpdating = True
End Sub
 
Function GetFolder() As String
Dim oFolder As Object
GetFolder = ""
Set oFolder = CreateObject("Shell.Application").BrowseForFolder(0, "Choose a folder", 0)
If (Not oFolder Is Nothing) Then GetFolder = oFolder.Items.Item.Path
Set oFolder = Nothing
End Function

  With wdDoc
  ...
  End With

  With wdDoc
    ' copy the styles
    .CopyStylesFromTemplate ("C:\Users\Terence Yip\AppData\Roaming\Microsoft\Templates\normal.dotm")
    ' replace headings
    With .Range.Find
      .Find.ClearFormatting
      .Replacement.ClearFormatting
      .Text = ""
      .Replacement.Text = ""
      .Forward = True
      .Wrap = wdFindContinue
      .Format = True
      .Style = "Heading 7"
      .Replacement.Style = "Heading 4"
      .Execute Replace:=wdReplaceAll
      .Style = "Heading 8"
      .Replacement.Style = "Heading 5"
      .Execute Replace:=wdReplaceAll
      .Style = "Heading 9"
      .Replacement.Style = "Heading 6"
      .Execute Replace:=wdReplaceAll
    End With
    'Save and close the document
    .Close True
  End With