I am using the following code with WinXP-Pro, and Visual Basic 6.0 SP5

The code works fine until the noted line
I have Outlook 2003 installed.

this function will attach my PDF file to the fax

Public Function SendFaxMessage(Optional AttachmentPath)
   'Send the fax via Outlook.

  Dim olookApp As Outlook.Application
  Dim olookMsg As Outlook.MailItem
  Dim olookRecipient As Outlook.Recipient
  Dim olookAttach As Outlook.Attachment

  ' create the Outlook session.
  Set olookApp = CreateObject("Outlook.Application")

  ' create the message.
  Set olookMsg = olookApp.CreateItem(olMailItem)

  With olookMsg
     ' add the To recipient(s) to the message.
     Set olookRecipient = .Recipients.Add(frmCalls.txtCalls(3).Text & "@w"
& frmCalls.lblFaxNo.Caption) 'Get name and Fax no.
     olookRecipient.Type = olTo

     ' add the CC recipient(s) to the message.
'      Set olookRecipient = .Recipients.Add("")    'Name deleted.
'      olookRecipient.Type = olCC

     ' set the Subject, Body, and Importance of the message.
     .Subject = frmCalls.txtCalls(4).Text
     .Body = "The fax is attached as a .pdf"
     .Importance = olImportanceHigh  'High importance

     ' add attachments to the message.
     If Not IsMissing(AttachmentPath) Then
        Set olookAttach = .Attachments.Add(AttachmentPath)
     End If

     ' resolve each Recipient's name
     For Each olookRecipient In .Recipients
        olookRecipient.Resolve
        If Not olookRecipient.Resolve Then
           olookMsg.Display   ' display any names that can't be resolved
        End If
     Next
        .Send 'This is where the error occurs.
     End With

     Set olookMsg = Nothing
     Set olookApp = Nothing

End Function