Sub Demo()
Application.ScreenUpdating = False
Dim StrFolder As String
' Browse for the starting folder
StrFolder = GetTopFolder
If StrFolder = "" Then Exit Sub
StrFolder = StrFolder & "\*.doc"
If UBound(Split(CreateObject("wscript.shell").Exec("Cmd /c Dir """ & StrFolder & """ /B/S").StdOut.ReadAll, vbCrLf)) > 0 Then
  ActiveDocument.Range.Text = CreateObject("wscript.shell").Exec("Cmd /c Dir """ & StrFolder & """ /B/S").StdOut.ReadAll
End If
Application.ScreenUpdating = True
End Sub

Function GetTopFolder() As String
Dim oFolder As Object
GetTopFolder = ""
Set oFolder = CreateObject("Shell.Application").BrowseForFolder(0, "Choose a folder", 0)
If (Not oFolder Is Nothing) Then GetTopFolder = oFolder.Items.Item.Path
Set oFolder = Nothing
End Function