How to write a VB program to send multipart SMIME signature email with attachement

The below link ( http://support.microsoft.com/default.aspx?scid=kb;EN-US;q318215 ) have tell us how to send a multipart SIME signed email without attachment.

My question is How to send multipart SMIME signed email WITH attachment.

For Microsoft example above, I have test it by adding the attachment command to the message, however, the response of the Mailbox in Outlook tell me that "Invalid Header". So I suspect even the attachment need to be signed ot something...

Anyone can help me?

Thanks
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ckchinAsked:
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Éric MoreauSenior .Net ConsultantCommented:
Take a look at http://www.experts-exchange.com/jsp/qManageQuestion.jsp?ta=visualbasic&qid=20256503

Some explorations have been done there!
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ckchinAuthor Commented:
Thanks, emoreau. However the exploration did not SIGN the message. still required more research on it. Did any body have some more fast track.
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DanRollinsCommented:
Hi ckchin,
It appears that you have forgotten this question. I will ask Community Support to close it unless you finalize it within 7 days. I will ask a Community Support Moderator to:

    Refund points and save as a 0-pt PAQ.

ckchin, Please DO NOT accept this comment as an answer.
EXPERTS: Post a comment if you are certain that an expert deserves credit.  Explain why.
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SpideyModCommented:
per recommendation

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