WTL-A WTL window hosting ActiveX control(IE)

演示如何在WTL窗口中容纳ActiveX控件（Windows自带的IE(WebBrowser)控件）：

#pragma once
#include "stdafx.h"
#include <ExDisp.h>
#include <ExDispid.h>
//ID of WebBrowser control
const UINT ID_WebBrowser = 1;
typedef CWinTraits<WS_OVERLAPPEDWINDOW|WS_CLIPCHILDREN> CMainWinTraits;
class CMainWindow :
    public CWindowImpl<CMainWindow,CWindow,CMainWinTraits>,
    public IDispEventImpl<ID_WebBrowser,CMainWindow>
{
public:
    DECLARE_WND_CLASS(_T("WTL ActiveX host window"))
    //Windows message handler
    BEGIN_MSG_MAP(CMainWindow)
        MSG_WM_CREATE(OnCreate)
        MSG_WM_DESTROY(OnDestroy)
        MSG_WM_SIZE(OnSize)
    END_MSG_MAP()
    //WebBrowser control event message handler
    BEGIN_SINK_MAP(CMainWindow)
        SINK_ENTRY(ID_WebBrowser,DISPID_DOWNLOADBEGIN,OnDownloadBegin)
        SINK_ENTRY(ID_WebBrowser,DISPID_DOWNLOADCOMPLETE,OnDownloadComplete)
    END_SINK_MAP()
    
    int OnCreate(LPCREATESTRUCT lpCreateStruct)
    {
        CRect rc;
        GetClientRect(&rc);
        /*
        //Create the WebBrowser control(IE) with ProgId
        HWND hWndIE = m_ax.Create(
            m_hWnd,
            rc,
            _T("Shell.Explorer.2"), //ProgId of WebBrowser control
            WS_CHILD|WS_VISIBLE,
            0,
            ID_WebBrowser);
        ATLASSERT(hWndIE);
        */
        
        //Create the WebBrowser control(IE) with CLSID
        CComPtr<IUnknown> spUnkWebBrowser;
        HRESULT hr = spUnkWebBrowser.CoCreateInstance(CLSID_WebBrowser);
        CHECKHR(hr);
        //Create the ActiveX host window
        HWND hWndWB = m_ax.Create(
            m_hWnd,
            rc,
            NULL,
            WS_CHILD|WS_VISIBLE,
            0,
            ID_WebBrowser);
        ATLASSERT(hWndWB);
        //Attach the WebBrowser control to host window
        CComPtr<IUnknown> spUnkContainer;
        m_ax.AttachControl(spUnkWebBrowser,&spUnkContainer);
        //Advise sink map
        AtlAdviseSinkMap(this,true);
        //Query interface
        hr = m_ax.QueryControl(&m_spIWebBrowser);
        CHECKHR(hr);
        CComBSTR site(_T("http://www.hust.edu.cn"));
        CComVariant v;
        hr = m_spIWebBrowser->Navigate(site,&v,&v,&v,&v);
        CHECKHR(hr);
        return 0;
    }
    
    void OnDestroy()
    {
        //Unadvise sink map
        AtlAdviseSinkMap(this,false);
        PostQuitMessage(0);
    }
    
    void OnSize(UINT nType, CSize size)
    {
        CRect rc;
        GetClientRect(&rc);
        m_ax.SetWindowPos(m_hWnd,&rc,SWP_NOZORDER|SWP_NOACTIVATE);
    }
    void __stdcall OnDownloadBegin()
    {
        SetWindowText(_T("Download begin:"));
    }
    void __stdcall OnDownloadComplete()
    {
        SetWindowText(_T("Download completed."));
    }
private:
    CAxWindow m_ax;
    CComPtr<IWebBrowser2> m_spIWebBrowser;
};

效果：