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ivan  
#1 Posted : Monday, May 2, 2011 5:13:10 AM(UTC)
ivan

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Visual C++ Example

When an Outlook user composes and sends a message using either Rich Text Format or HTML Format, Outlook automagically generates a file, winmail.dat, and attaches it to the end of the email. The winmail.dat contains the rich text body and original attachments. To parse winmail.dat (TNEF stream) file, we should use ParseTNEF method.

The following code demonstrates how to parse MAPI winmail.dat in email.
Code:

// The following example codes demonstrate parsing winmail.dat - TNEF stream
// To get full sample projects, please download and install EAGetMail on your machine.
// To run it correctly, please change email server, user, password, folder, file name value to yours

#include "stdafx.h" 

#include "eagetmailobj.tlh" 
using namespace EAGetMailObjLib; 

void ParseEmail( LPCTSTR lpszFile ) 
{ 
    try 
    { 
        IMailPtr oMail = NULL; 
        oMail.CreateInstance("EAGetMailObj.Mail"); 
        oMail->LicenseCode = _T("TryIt"); 

        oMail->LoadFile( lpszFile, VARIANT_FALSE ); 

        if( oMail->IsEncrypted == VARIANT_TRUE ) 
        { 
            // this email is encrypted, we decrypt it by user default certificate.
            // you can also use specified certificate like this
            // ICertificatePtr oCert = NULL;
            // oCert.CreateInstance("EAGetMailObj.Certificate");
            // oCert->LoadFromFile(_T("c:\\test.pfx"), _T("pfxpassword"), CRYPT_USER_KEYSET);
            // oMail = oMail->Decrypt( oCert );
            oMail = oMail->Decrypt( NULL ); 

        } 

        if( oMail->IsSigned == VARIANT_TRUE ) 
        { 
            // This email is digital signed.
            ICertificatePtr oCert = oMail->VerifySignature(); 
            _tprintf( _T("This email contains a valid digital signature.\r\n")); 
            // You can add the certificate to your certificate storage like this
            // oCert->AddToStore( CERT_SYSTEM_STORE_CURRENT_USER,
            // _T("addressbook"));
            // then you can use send the encrypted email back to this sender.
        } 

        // Parse email sender
        _tprintf(_T("From: %s\r\n"), (const TCHAR*)oMail->From->Address); 

        // Parse to recipient
        _variant_t varry = oMail->To; 
        SAFEARRAY *psa = varry.parray; 
        long i = 0, LBound = 0, UBound = 0; 
        SafeArrayGetLBound( psa, 1, &LBound ); 
        SafeArrayGetUBound( psa, 1, &UBound ); 
        for( i = LBound; i <= UBound; i++ ) 
        { 
            _variant_t vt; 
            SafeArrayGetElement( psa, &i, &vt ); 

            IMailAddressPtr pAddr; 
            vt.pdispVal->QueryInterface(__uuidof(IMailAddress), (void**)&pAddr); 
            _tprintf(_T("To: %s\r\n"), (const TCHAR*)pAddr->Address); 
        } 

        // Parse CC
        varry = oMail->Cc; 
        psa = varry.parray; 
        SafeArrayGetLBound( psa, 1, &LBound ); 
        SafeArrayGetUBound( psa, 1, &UBound ); 
        for( i = LBound; i <= UBound; i++ ) 
        { 
            _variant_t vt; 
            SafeArrayGetElement( psa, &i, &vt ); 

            IMailAddressPtr pAddr; 
            vt.pdispVal->QueryInterface(__uuidof(IMailAddress), (void**)&pAddr); 
            _tprintf(_T("Cc: %s\r\n"), (const TCHAR*)pAddr->Address); 
        } 

        // Parse email subject
        _tprintf(_T("Subject: %s\r\n"), (const TCHAR*)oMail->Subject); 

        // Parse email text body
        _tprintf(_T("TextBody: %s\r\n"), (const TCHAR*)oMail->TextBody); 

        // Parse email HTML body
        _tprintf(_T("HtmlBody: %s\r\n"), (const TCHAR*)oMail->HtmlBody); 

        // Parse attachment
        varry = oMail->Attachments; 
        psa = varry.parray; 
        SafeArrayGetLBound( psa, 1, &LBound ); 
        SafeArrayGetUBound( psa, 1, &UBound ); 
        for( i = LBound; i <= UBound; i++ ) 
        { 
            _variant_t vt; 
            SafeArrayGetElement( psa, &i, &vt ); 

            IAttachmentPtr pAtt; 
            vt.pdispVal->QueryInterface(__uuidof(IAttachment), (void**)&pAtt); 

            if( _tcsicmp((const TCHAR*)pAtt->Name, _T("winmail.dat")) == 0 ) 
            { 
                // this attachment is in OUTLOOK RTF (TNEF) format, decode it here.
                _variant_t tatts; 
                tatts = oMail->ParseTNEF( pAtt->Content, VARIANT_TRUE ); 

                long XLBound = 0, XUBound = 0; 
                SAFEARRAY* tpsa = tatts.parray; 
                SafeArrayGetLBound( tpsa, 1, &XLBound ); 
                SafeArrayGetUBound( tpsa, 1, &XUBound ); 
                for( long x = XLBound; x <= XUBound; x++ ) 
                { 
                    _variant_t vttAtt; 
                    SafeArrayGetElement( tpsa, &x, &vttAtt ); 
                    IAttachmentPtr ptAtt; 
                    vttAtt.pdispVal->QueryInterface( __uuidof(IAttachment), (void**)&ptAtt ); 
                    _tprintf(_T("winmail.dat: %s\r\n"), (const TCHAR*)ptAtt->Name); 
                } 
                continue; 
            } 

            _tprintf(_T("Attachment: %s\r\n"), (const TCHAR*)pAtt->Name); 
        } 

    } 
    catch( _com_error &ep ) 
    { 
        _tprintf(_T("Error: %s\r\n"), (const TCHAR*)ep.Description()); 
    } 
} 

int _tmain(int argc, _TCHAR* argv[]) 
{ 
    // Initialize COM environment
    ::CoInitialize( NULL ); 

    ParseEmail(_T("c:\\my folder\\test.eml")); 

    return 0; 
} 

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