'now playing' code for windows media player?

Hello,

I've been trying to add a now playing display to my app, I downloaded the WMSDK and samples and they seem to work fine for MFC apps. I tried porting it to win32 and it keeps crashing on:

AtlAxWinInit();

The class I created works fine in an MFC app, but whenever i try to use it in win32 it just crashes on start. Heres the code I use:

CMediaPlayer.cpp

Code:

---

#include "stdafx.h"
#include "RemoteHost.h"
#include "CMediaPlayer.h"

// converts a BSTR to a std::string
string bstr2s(const BSTR &cmd)
{
        int n = SysStringLen(cmd);
        char sTemp[2] = {0};
        string sRet = "";

        for (int i = 0; i < n; ++i)
        {
                sTemp[0] = (char)cmd[i];
                sRet.append(sTemp);
        }

        return sRet;
}

CMediaPlayer::CMediaPlayer(void)
{
        m_bInitialized = false;

        m_pView = NULL;
}

CMediaPlayer::~CMediaPlayer(void)
{
        Release();
}

bool CMediaPlayer::Initialize(HWND hWnd)
{
        CComPtr<IAxWinHostWindow> spHost;
        CComPtr<IObjectWithSite> spHostObject;
        CComObject<CRemoteHost> *pRemoteHost = NULL;
        HRESULT hr = S_OK;

        AtlAxWinInit(); // crashes here, on the .lock() line to be specific
        m_pView = new CAxWindow(); // crashes here if above is commented out
        hr = m_pView ? S_OK : E_OUTOFMEMORY;

        if (FAILED(hr))
        {
                Release();
                return false;
        }

        m_pView->Create(hWnd, NULL, NULL, 0);
        hr = IsWindow(m_pView->m_hWnd) ? S_OK : E_FAIL;

        if (FAILED(hr))
        {
                Release();
                return false;
        }

        hr = m_pView->QueryHost(IID_IObjectWithSite, (void **)&spHostObject);
        hr = spHostObject.p ? hr : E_FAIL;

        if (FAILED(hr))
        {
                Release();
                return false;
        }

        hr = CComObject<CRemoteHost>::CreateInstance(&pRemoteHost);

        if (pRemoteHost)
                pRemoteHost->AddRef();
        else
                hr = E_POINTER;

        if (FAILED(hr))
        {
                Release();
                return false;
        }

        hr = spHostObject->SetSite((IWMPRemoteMediaServices *)pRemoteHost);

        if (FAILED(hr))
        {
                Release();
                return false;
        }

        hr = m_pView->QueryHost(&spHost);
        hr = spHost.p ? hr : E_FAIL;

        if (FAILED(hr))
        {
                Release();
                return false;
        }

        // Create WMP control using its CLSID
        hr = spHost->CreateControl(CComBSTR(L"{6BF52A52-394A-11d3-B153-00C04F79FAA6}"), m_pView->m_hWnd, 0);

        if (FAILED(hr))
        {
                Release();
                return false;
        }

        hr = m_pView->QueryControl(&m_pWMPlayer);
        hr = m_pWMPlayer.p ? hr : E_FAIL;

        if (FAILED(hr))
        {
                Release();
                return false;
        }

        SafeRelease(pRemoteHost);
        m_bInitialized = true;

        return true;
}

void CMediaPlayer::Release()
{
        if (!m_bInitialized)
                return;

        m_pWMPlayer = NULL;
        SafeDelete(m_pView);

        m_bInitialized = false;
}

map<string, string> CMediaPlayer::NowPlaying()
{
        map<string, string> mapReturn;

        if (!m_bInitialized)
                return mapReturn;

        CComPtr<IWMPMedia> spMedia;
        CComBSTR bstrRet;
        HRESULT hr = S_OK;

        // get current song playing info
        hr = m_pWMPlayer->get_currentMedia(&spMedia);
        hr = spMedia.p ? hr : E_FAIL;

        if (SUCCEEDED(hr))
        {
                // get song name
                hr = spMedia->get_name(&bstrRet);
                hr = bstrRet.m_str ? hr : E_FAIL;

                if (SUCCEEDED(hr))
                {
                        mapReturn["Name"] = bstr2s(bstrRet);
                        bstrRet.Empty();
                }

                // get all meta tags
                long lCount = 0;
                hr = spMedia->get_attributeCount(&lCount);

                if (SUCCEEDED(hr))
                {
                        CComBSTR bstrName;

                        for (uint i = 0; i < lCount; ++i)
                        {
                                // Use getAttributeName and getItemInfo pair to list metadata
                                hr = spMedia->getAttributeName(i, &bstrName);
                                hr = bstrName.m_str ? hr : E_FAIL;

                                if (SUCCEEDED(hr))
                                {
                                        hr = spMedia->getItemInfo(bstrName, &bstrRet);
                                        hr = bstrRet.m_str ? hr : E_FAIL;

                                        // add meta tag to map
                                        if (SUCCEEDED(hr))
                                        {
                                                mapReturn[bstr2s(bstrName)] = bstr2s(bstrRet);
                                                bstrName.Empty();
                                                bstrRet.Empty();
                                        }
                                }
                        }
                }
        }

        return mapReturn;
}

---

CMediaPlayer.h

Code:

---

#ifndef MEDIAPLAYER_H
#define MEDIAPLAYER_H

#if _MSC_VER > 1000
#pragma once
#endif

#include <atlhost.h>
#include <wmp.h>
#include <wmpids.h>
#include "common.h"

class CMediaPlayer
{
public:
        CMediaPlayer(void);
        ~CMediaPlayer(void);

        bool Initialize(HWND hWnd);
        void Release();

        map<string, string> NowPlaying();

private:
        bool m_bInitialized;
        CAxWindow *m_pView; // IE control to hold WMP OCX
        CComPtr<IWMPPlayer4> m_pWMPlayer; // WMPlayer
};

#endif

---

stdafx.h

Code:

---

//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// stdafx.h : include file for standard system include files,
//      or project specific include files that are used frequently,
//      but are changed infrequently

#if !defined(AFX_STDAFX_H__4AF68A18_AE4D_44BE_BC5B_EFC0332CFAE3__INCLUDED_)
#define AFX_STDAFX_H__4AF68A18_AE4D_44BE_BC5B_EFC0332CFAE3__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#define STRICT
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0400
#endif
#define _ATL_APARTMENT_THREADED

#include <atlbase.h>
#include <atlwin.h>
#include <atlcom.h>

#include <commctrl.h>
#include <stdio.h>

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_STDAFX_H__4AF68A18_AE4D_44BE_BC5B_EFC0332CFAE3__INCLUDED)

---