Erase File Properties of MS Office Files

[Lonely]

Hi,
I have been using the following Excel Macro which erases all the properties (Custom and embedded) from all MS Excel files placed in the folder c:\folder1\.

'--------Code Start--------------
Sub Properties()
MyPath = "C:\folder1"
MyFile = Dir(MyPath & Application.PathSeparator & _
"*.xls", vbDirectory)
Application.ScreenUpdating = False
Do While MyFile <> ""
If MyFile = ThisWorkbook.Name Then GoTo ResumeSub:
    Workbooks.Open (MyPath & "\" & MyFile)
For I = ActiveWorkbook.CustomDocumentProperties.Count To 1 Step -1
    ActiveWorkbook.CustomDocumentProperties.Item(I).Delete
Next
On Error Resume Next
For I = ActiveWorkbook.BuiltinDocumentProperties.Count To 1 Step -1
    ActiveWorkbook.BuiltinDocumentProperties.Item(I) = ""
Next
Workbooks(MyFile).Close True
ResumeSub:
    MyFile = Dir
Loop
    Application.ScreenUpdating = True
End Sub
'--------Code End--------------

Similarly, I have been using the following VBA code for MS Word files as an embedded macro.

'---------Code Start----------
Sub Properties()
MyPath = "C:\folder1"
MyFile = Dir(MyPath & Application.PathSeparator & _
"*.doc", vbDirectory)
Application.ScreenUpdating = False
Do While MyFile <> ""
If MyFile = ThisDocument.Name Then GoTo ResumeSub:
Documents.Open (MyPath & "\" & MyFile)
For I = ActiveDocument.CustomDocumentProperties.Count To 1 Step -1
ActiveDocument.CustomDocumentProperties.Item(I).Delete
Next
On Error Resume Next
For I = ActiveDocument.BuiltInDocumentProperties.Count To 1 Step -1
ActiveDocument.BuiltInDocumentProperties.Item(I) = ""
Next
Documents(MyFile).Close True
ResumeSub:
MyFile = Dir
Loop
Application.ScreenUpdating = True
End Sub
'--------Code End--------------

Now I want to convert these 2 macros to a standalone single VB application which will erase all the file properties from all the Excel and Word files kept in c:\folder1\.

Going further, can somebody help me design a code which can do the same for MS PowerPoint files?

Please can someone help me in this.
Thanks in Advance,
Lonely