Download Attachment and Rename With Subject Line v2

I saw the old thread, linked here http://www.excelforum.com/outlook-pr...ject-line.html but am wondering a different question (complete newb to VBA)...

Sub Download_attachments_Sent_by_me2me(MyMail As MailItem)
Dim strID As String
Dim objNS As Outlook.NameSpace
Dim objMail As Outlook.MailItem
Dim objAtt As Outlook.Attachment
Dim c As Integer
Dim save_name As String

'Place path to sav to on next line. Note that you must include the
'final backslash
Const save_path As String = "C:\Users\jason.anderson\outlookattachments\"

strID = MyMail.EntryID
Set objNS = Application.GetNamespace("MAPI")
Set objMail = objNS.GetItemFromID(strID)

If objMail.Attachments.Count > 0 Then
For c = 1 To objMail.Attachments.Count
Set objAtt = objMail.Attachments(c)
save_name = Left(objAtt.FileName, Len(objAtt.FileName) - 4)
'save_name = save_name & Format(objMail.ReceivedTime, "_mm-dd-yyyy_hhmm")
save_name = save_name & Right(objAtt.FileName, 4)

subject_name = objMail.Subject 'get subject
correct_sub = Replace(subject_name, ":", "") ' remove bad characters
objAtt.SaveAsFile save_path & correct_sub & ".pdf" ' save file on PATH with CORRECT SUB

Next
End If

Set objAtt = Nothing
Set objMail = Nothing
Set objNS = Nothing
End Sub

This is the code I pasted in, but now I am trying to actually run the VBA against a series of emails - But am getting a Run-time error '4'4': Object Required notification for this line of code:

strID = MyMail.EntryID

What is this supposed to be?