Setting PR_TRANSPORT_MESSAGE_HEADERS on an outgoing message won't do
anything...

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Tom at GSD" wrote in message
...
Thanks Dmitry - I will give that a try. I was using the following code
snippit but it seemed not to be working properly

IUnknownPtr pUnk = spForward-GetMAPIOBJECT();
CComQIPtrIMAPIProp, &IID_IMAPIProp pMAPIProp(pUnk);
ATLASSERT(pMAPIProp);
SPropTagArray ar = {0};
ULONG nProps = 0;
SPropValue *arProps = NULL;
TCHAR*szResult = NULL;

ar.cValues = 1;
ar.aulPropTag[0] = PR_TRANSPORT_MESSAGE_HEADERS;
pMAPIProp-GetProps(&ar, PT_UNSPECIFIED, &nProps, &arProps);


"Dmitry Streblechenko" wrote:

1. Read MailItem.MAPIOBJECT property
2. QI it for IMessage Extended MAPI interface
3. Call IMessage::GetIDsFromNames() passing the appropriate GUID and id
4. "Or" the retirned tag with the appropriate type (PT_STRING8)
5. Use Imessage::SetProps or HrSetOneProp to set the property with tag
from
#4.

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Tom at GSD" wrote in message
...
Hi,

I have developed an ATL/C++ add-in that I want to add a header item to
a
_MailItem before I forward the email. The idea is that I take an item
out
of
the inbox, modify the header and then forward it to another email
address.
I
see there are Redemption examples; but I do not want to use the
redemption
libraries. Is there an extended MAPI example that will show me how to
accomplish this? I do not want to use any third party utilities. I have
looked for examples on the web but I do not see any.

Thanks,
Tom -