Sub ConvertDocToDocx()
'Updated by ExtendOffice 20181128
    Dim xDlg As FileDialog
    Dim xFolder As Variant
    Dim xFileName As String
    Application.ScreenUpdating = False
    Set xDlg = Application.FileDialog(msoFileDialogFolderPicker)
    If xDlg.Show <> -1 Then Exit Sub
    xFolder = xDlg.SelectedItems(1) + "\"
    xFileName = Dir(xFolder & "*.doc", vbNormal)
    While xFileName <> ""
        Documents.Open FileName:=xFolder & xFileName, _
            ConfirmConversions:=False, ReadOnly:=False, AddToRecentFiles:=False, _
            PasswordDocument:="", PasswordTemplate:="", Revert:=False, _
            WritePasswordDocument:="", WritePasswordTemplate:="", Format:= _
            wdOpenFormatAuto, XMLTransform:=""
        ActiveDocument.SaveAs xFolder & Replace(xFileName, "doc", "docx"), wdFormatDocumentDefault
        ActiveDocument.Close
        xFileName = Dir()
    Wend
    Application.ScreenUpdating = True
End Sub