Visual C++ - Parse Outlook MSG file (.msg) and convert it to RFC822 message (.eml)¶

The following c++ codes demonstrates how to parse from, to, cc, subject, body text, attachments of specified .MSG file. You can save email as .msg file in Outlook instead of .eml file. The following codes can parse such *.msg file.

Sections:

Installation
Add reference
Visual C++ - Parse Outlook MSG file (.msg) - example
Visual C++ - Convert Outlook MSG file to RFC822 message file (.eml)
32bit/x64 ActiveX DLL
Distribution

Installation¶

Before you can use the following sample codes, you should download the EAGetMail Installer and install it on your machine at first. Full sample projects are included in this installer.

Add reference¶

To better demonstrate how to retrieve email and parse email, let’s create a Visual C++ console project named “receiveemail” at first, and then add the reference of EAGetMail in your project.

To use EAGetMail POP3 & IMAP4 ActiveX Object in your project, the first step is “Add header files of EAGetMail to your project”. Please go to C:\Program Files\EAGetMail\Include\tlh or C:\Program Files (x86)\EAGetMail\Include\tlh folder, find eagetmailobj.tlh and eagetmailobj.tli, and then copy these files to your project folder. You can start to use it to retrieve email and parse email in your project.

Visual C++ - Parse Outlook MSG file (.msg) - example¶

The following example codes demonstrate parsing .msg (Outlook MSG file) file. In order to run it correctly, please change email server, user, password, folder, file name value to yours.

Note

To get full sample projects, please download and install EAGetMail on your machine.

#include "stdafx.h"
#include <Windows.h>

#include "eagetmailobj.tlh"
using namespace EAGetMailObjLib;

void ParseMSG(LPCTSTR lpszFile)
{
    try
    {
        IMailPtr oMail = NULL;
        oMail.CreateInstance(__uuidof(EAGetMailObjLib::Mail));
        oMail->LicenseCode = _T("TryIt");

        oMail->LoadOMSGFile(lpszFile);

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

        IAddressCollectionPtr addressList = oMail->ToList;
        for(long i = 0; i < addressList->Count; i++)
        {
            IMailAddressPtr oAddr = addressList->GetItem(i);
            _tprintf(_T("To: %s<%s>\r\n"), (TCHAR*)oAddr->Name, (TCHAR*)oAddr->Address);
        }

        addressList = oMail->CcList;
        for(long i = 0; i < addressList->Count; i++)
        {
            IMailAddressPtr  oAddr = addressList->GetItem(i);
            _tprintf(_T("Cc: %s<%s>\r\n"), (TCHAR*)oAddr->Name, (TCHAR*)oAddr->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
        IAttachmentCollectionPtr attachments = oMail->AttachmentList;
        for(long i = 0; i < attachments->Count; i++)
        {
            IAttachmentPtr pAtt = attachments->GetItem(i);
            _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);

    ParseMSG(_T("c:\\my folder\\test.msg"));

    return 0;
}

Visual C++ - Convert Outlook MSG file to RFC822 message file (.eml)¶

The following Visual C++ codes demonstrates how to convert .msg file to rfc822 message file (.eml).

#include "stdafx.h"
#include <windows.h>

#include "eagetmailobj.tlh"
using namespace EAGetMailObjLib;

void ConvertMSGToRfc822(LPCTSTR lpszFile, LPCTSTR lpszEMLFile)
{
    try
    {
        IMailPtr oMail = NULL;
        oMail.CreateInstance(__uuidof(EAGetMailObjLib::Mail));
        oMail->LicenseCode = _T("TryIt");

        oMail->LoadOMSGFile(lpszFile);
        oMail->Update();

        oMail->SaveAs(lpszEMLFile, VARIANT_TRUE);
    }
    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);

    ConvertMSGToRfc822(_T("c:\\my folder\\test.msg"), _T("c:\\my folder\\test.eml"));

    return 0;
}

32bit/x64 ActiveX DLL¶

Seperate builds of run-time dll for 32 and x64 platform

File	Platform
Installation Path\Lib\native\x86\EAGetMailObj.dll	32 bit
Installation Path\Lib\native\x64\EAGetMailObj.dll	64 bit

Distribution¶

Standard EXE

For VB6, C++, Delphi or other standard exe application, you can distribute EAGetMailObj.dll with your application to target machine without COM-registration and installer. To learn more detail, please have a look at Registration-free COM with Manifest File.
Script

For ASP, VBScript, VBA, MS SQL Stored Procedure, you need to install EAGetMail on target machine by EAGetMail installer, both 32bit/x64 DLL are installed and registered.

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