Sub OneFolderbatch()
Application.ScreenUpdating = False
Dim strFolder As String, strFile As String, wdDoc As Document
strFolder = GetFolder
If strFolder = "" Then Exit Sub
strFile = Dir(strFolder & "\*.doc", vbNormal)
While strFile <> ""
  Set wdDoc = Documents.Open(FileName:=strFolder & "\" & strFile, AddToRecentFiles:=False, Visible:=False)
  'Next line you can adapt the Macro to be executed for every document in a single folder
  Call Macro12(wdDoc)
  With wdDoc
    .SaveAs2 FileName:=strFolder & "\" & Split(strFile, ".")(0) & ".docx", FileFormat:=wdFormatXMLDocument, AddToRecentFiles:=False
    .Close SaveChanges:=False
  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
 
Sub Macro2()
    With ActiveDocument
        'insert the TOC
        .TablesOfContents.Add _
                Range:=Selection.Range, _
                RightAlignPageNumbers:=True, _
                UseHeadingStyles:=True, _
                UpperHeadingLevel:=1, _
                LowerHeadingLevel:=5, _
                IncludePageNumbers:=True, _
                AddedStyles:="", _
                UseHyperlinks:=True, _
                HidePageNumbersInWeb:=True, _
                UseOutlineLevels:=True
        'select the TOC
        .TablesOfContents.Item(1).Range.Select
        ''Unlink the TOC field
        'Selection.Fields.Unlink
        'Copy the unlinked TOC
        Selection.Copy
        'Undo the unlinking to restore the TOC field
        ActiveDocument.Undo 1
        'Next line is optional
        '.TablesOfContents.Item(1).Range.Delete
        Selection.WholeStory
        Selection.Delete Unit:=wdCharacter, Count:=1
        Selection.PasteAndFormat (wdFormatOriginalFormatting)
    End With
    
End Sub

Sub Macro3(wdDoc As Document)
  With wdDoc
    With ActiveDocument
        'insert the TOC
        .TablesOfContents.Add _
                Range:=Selection.Range, _
                RightAlignPageNumbers:=True, _
                UseHeadingStyles:=True, _
                UpperHeadingLevel:=1, _
                LowerHeadingLevel:=5, _
                IncludePageNumbers:=True, _
                AddedStyles:="", _
                UseHyperlinks:=True, _
                HidePageNumbersInWeb:=True, _
                UseOutlineLevels:=True
        'select the TOC
        .TablesOfContents.Item(1).Range.Select
        ''Unlink the TOC field
        'Selection.Fields.Unlink
        'Copy the unlinked TOC
        Selection.Copy
        'Undo the unlinking to restore the TOC field
        ActiveDocument.Undo 1
        'Next line is optional
        '.TablesOfContents.Item(1).Range.Delete
        Selection.WholeStory
        Selection.Delete Unit:=wdCharacter, Count:=1
        Selection.PasteAndFormat (wdFormatOriginalFormatting)
    End With
  End With
End Sub

Sub Macro12(wdDoc As Document)
'
' Macro12 Macro
'
'
  With wdDoc
    With .Range.Find
      .ClearFormatting
      .Replacement.ClearFormatting
      .Forward = True
      .Wrap = wdFindContinue
      .Format = False
      .MatchCase = False
      .MatchWholeWord = False
      .MatchWildcards = False
      .MatchSoundsLike = False
      .MatchAllWordForms = False
      .Text = "a"
      .Replacement.Text = "BBBBB"
      .Execute Replace:=wdReplaceAll
    End With
  End With
End Sub