Option Explicit
Dim FSO As Object, oFolder As Object, StrFolds As String
 
Sub KillDocuments()
Application.ScreenUpdating = False
Dim TopLevelFolder As String
Dim TheFolders As Variant, aFolder As Variant
Dim strFile As String, i As Long
TopLevelFolder = GetFolder
StrFolds = vbCr & TopLevelFolder
If TopLevelFolder = "" Then Exit Sub
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))
strFile = Dir(CStr(Split(StrFolds, vbCr)(i)) & "\*.doc", vbNormal)
Do While strFile <> ""
  Kill CStr(Split(StrFolds, vbCr)(i)) & "\" & strFile
  strFile = Dir()
Loop
Next
Application.ScreenUpdating = True
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
 
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