Может ли кто-нибудь помочь мне с эквивалентным кодом C++?

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[ClassInterface(ClassInterfaceType.None), ComVisible(true), Guid("8a194578-81ea-4850-9911-13ba2d71efbd")]
    public class BrowserHelperObject : IObjectWithSite
    {
        private WebBrowser webBrowser;
        private HTMLDocument document;
        public static string BHOKEYNAME = "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Browser Helper Objects";
        public void OnDocumentComplete(object pDisp, ref object URL)
        {
            this.document = (HTMLDocument)this.webBrowser.Document;
            Marshal.ReleaseComObject(this.document);
        }
        [ComRegisterFunction]
        public static void RegisterBHO(Type type)
        {
            RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(BrowserHelperObject.BHOKEYNAME, RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.FullControl);
            if (registryKey == null)
            {
                registryKey = Registry.LocalMachine.CreateSubKey(BrowserHelperObject.BHOKEYNAME);
            }
            string guid = type.GUID.ToString("B");
            RegistryKey ourKey = registryKey.OpenSubKey(guid, true);
            if (ourKey == null)
            {
                ourKey = registryKey.CreateSubKey(guid);
            }
            ourKey.SetValue("IEAddinApplied", 1, RegistryValueKind.DWord);
            registryKey.Close();
            ourKey.Close();
        }
        [ComUnregisterFunction]
        public static void UnregisterBHO(Type type)
        {
            RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(BrowserHelperObject.BHOKEYNAME, RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.FullControl);
            string guid = type.GUID.ToString("B");
            if (registryKey != null)
            {
                registryKey.DeleteSubKey(guid, false);
            }
        }
        public int SetSite(object site)
        {
            if (site != null)
            {
                this.webBrowser = (WebBrowser)site;
                this.webBrowser.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
            }
            else
            {
                this.webBrowser.DocumentComplete -= new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
                Marshal.ReleaseComObject(this.document);
                this.webBrowser = null;
            }
            return 0;
        }
        public int GetSite(ref Guid guid, out IntPtr ppvSite)
        {
            IntPtr punk = Marshal.GetIUnknownForObject(this.webBrowser);
            int hr = Marshal.QueryInterface(punk, ref guid, out ppvSite);
            Marshal.Release(punk);
            return hr;
        }

Что я уже пробовал:

Проблема, с которой я столкнулся, заключается в следующем

OnDocumentComplete

Метод и с этой частью кода

if (site != null)
            {
                this.webBrowser = (WebBrowser)site;
                this.webBrowser.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
            }
            else
            {
                this.webBrowser.DocumentComplete -= new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
                Marshal.ReleaseComObject(this.document);
                this.webBrowser = null;
            }

Также я хочу сослаться shdocvw.dll и мштмл.DLL в проект c++

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