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Reading and Writing Messages in Outlook Express

, 27 Mar 2006
This article was done to provide an example of IStoreNamespace / IStoreFolder.
/* $Id: DemoDlg.cpp,v 1.3 2005/08/16 17:15:09 pyabo Exp $
 * Author: Pablo Yabo (
 * Copyright (c) 2004-2006 Nektra S.A., Buenos Aires, Argentina.
 * All rights reserved.
 * You may modify and/or integrate this code into your commercial software
 * keeping this notice.

#include "stdafx.h"
#include "demo.h"
#include "CreateMsgDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;

// CCreateMsgDlg dialog

CCreateMsgDlg::CCreateMsgDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCreateMsgDlg::IDD, pParent)
	m_bodyValue = _T("");
	m_fromValue = _T("");
	m_subjectValue = _T("");
	m_toValue = _T("");

void CCreateMsgDlg::DoDataExchange(CDataExchange* pDX)
	DDX_Text(pDX, IDC_EDIT_BODY, m_bodyValue);
	DDX_Text(pDX, IDC_EDIT_FROM, m_fromValue);
	DDX_Text(pDX, IDC_EDIT_SUBJECT, m_subjectValue);
	DDX_Text(pDX, IDC_EDIT_TO, m_toValue);


// CCreateMsgDlg message handlers

void CCreateMsgDlg::SetFolder(IStoreFolder *pFolder)
	m_pFolder = pFolder;

void CCreateMsgDlg::OnOK() 
	IStream *newMail = NULL;
	ULONG len;
	CString msgSource;


    msgSource = _T("From: ");
	msgSource += m_fromValue + _T("\r\n");
	msgSource += _T("To:");
	msgSource += m_toValue + _T("\r\n");
	msgSource += _T("Subject:");
	msgSource += m_subjectValue + _T("\r\n\r\n");
	msgSource += m_bodyValue;
	hr = m_pFolder->CreateStream(0, 0, &newMail, &msgId);
	if(FAILED(hr)) {
		MessageBox(_T("Cannot Create Stream."), _T("Demo Error"));

	hr = newMail->Write((const char *) msgSource, msgSource.GetLength(), &len);
	if(FAILED(hr)) {
		MessageBox(_T("Cannot Write message."), _T("Demo Error"));

	hr = m_pFolder->CommitStream(0, 0, 0, newMail, msgId, NULL);
	if(FAILED(hr)) {
		MessageBox(_T("Cannot Commit Stream."), _T("Demo Error"));



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About the Author

Pablo Yabo
Technical Lead
Argentina Argentina
Pablo Yabo is a Software Developer since he was young, specialized in system internals.
In 2003 years ago founded with Sebastian Wain a Company named Nektra specialized in Outlook Express and Outlook Plugin Development.
Now there is a new Windows Live Mail API 2011 / 2009 that works on all the platforms Windows 7, Vista and XP
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