Using DSO OLE Document Properties Reader 2.0

I can use DSO OLE Document Properties Reader 2.0 to view properties of files on a NTFS partition such as word documents, jpegs, etc. For example, with a Word 2000 document I can view the Title, Author, Comments, etc under the File Properties Tab.

How Can I change these on a file that already exists?

I am not creating the file, just tagging it with useful info.

I can create my own custom tag, such as Address: and assign a value to it, but the custom properties do not show up under file properties in Explorer. I really would like to modify the Title, Author, Comments, etc Properties.

please help...

VB Code:

'*********************************************************************
' FileProp.frm
'
' VB6 Sample code for reading file properties using DSOFILE 2.0
'
'  Copyright (c)1999-2000 Microsoft Corporation, All Rights Reserved
'  Microsoft Product Support Services, Developer Support
'
'  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
'  ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
'  TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR
'  A PARTICULAR PURPOSE.
'
'*********************************************************************
Option Explicit
 
'*********************************************************************
' FileProp Form Member Variables
'*********************************************************************
' Uses reference to "DSO OLE Document Properties Reader 2.0"
Private m_oDocumentProps As DSOFile.OleDocumentProperties
 
'*********************************************************************
' Form_Load  -- Creates new instance of the component. Failure here
'   will result in termination of the application. You need to register
'   the DLL before building and running this sample!!
'*********************************************************************
Private Sub Form_Load()
 
 ' Create an instance of the DSOFile Object...
   Set m_oDocumentProps = New DSOFile.OleDocumentProperties
      
 ' Fill in the default items for the DataType list...
   lstCustType.AddItem "String"
   lstCustType.AddItem "Long"
   lstCustType.AddItem "Double"
   lstCustType.AddItem "Boolean"
   lstCustType.AddItem "Date"
 
 ' Show the form...
   Me.Show
      
 ' Pick a file and open the properties for it,
   If Not OpenDocumentProperties Then
      End ' If user cancels, we exit...
   End If
   
End Sub
 
'*********************************************************************
' Form_Unload  -- Closes the dialog and prompts user to save (if dirty).
'*********************************************************************

VB Code:

Dim oSummProps As DSOFile.SummaryProperties
   'On Error Resume Next
   Set oSummProps = m_oDocumentProps.SummaryProperties
   If (txtAuthor.Text <> oSummProps.Author) Then
      oSummProps.Author = txtAuthor.Text
   End If

Pretty easy to set values, depending on the file type. Word Docuent no problem. I can do it on some jpeg's, but not others... and no bitmap or gif files.

I get:

run-time error '-21474891 (80070005)'