WebBrowser 控件,如何确定页面载入完成

#include <exdispid.h>

#include "browser.h"

/**

* @brief Html显示视

*/

class CHtmlShowView:

	public CWindowImpl<CHtmlShowView, CAxWindow>, 

	public CWebBrowser2<CHtmlShowView>

{

public:

	HWND m_parentWnd;

	CEdit *m_URL;

	CMultiPaneStatusBarCtrl *m_StatusBar;

	CListViewCtrl	*m_PostListView;

	CListViewCtrl	*m_HeaderListView;

	CRichEditCtrl	*m_PostRowDataShow;

	BOOL			m_isAnalyer;

	_bstr_t			m_requestURL;					//请求URL

	string			m_domain;						//请求域



	

	DECLARE_WND_SUPERCLASS(NULL, CAxWindow::GetWndClassName())

	CHtmlShowView(void):m_parentWnd(NULL),m_URL(NULL),m_StatusBar(NULL),m_isAnalyer(FALSE)

	{

		AtlAxWinInit();

		m_requestURL = "";

		m_domain = "";

	}

	~CHtmlShowView(void){}



	BOOL PreTranslateMessage(MSG* pMsg)

	{

		if((pMsg->message < WM_KEYFIRST || pMsg->message > WM_KEYLAST) &&

			(pMsg->message < WM_MOUSEFIRST || pMsg->message > WM_MOUSELAST))

			return FALSE;

		return (BOOL)SendMessage(WM_FORWARDMSG, 0, (LPARAM)pMsg);

	}



	BEGIN_MSG_MAP(CHtmlShowView)

		CHAIN_MSG_MAP(CWebBrowser2<CHtmlShowView>)

	END_MSG_MAP()



	BOOL StartHtml(LPCTSTR url)

	{

		Stop();

		m_isAnalyer = TRUE;

		CComPtr<IWebBrowser2> webBrowser2;

		m_requestURL = "";

		m_domain = "";

		HRESULT hr=this->QueryControl(__uuidof(IWebBrowser2),(void **)&webBrowser2);

		if(SUCCEEDED(hr))

			webBrowser2->Navigate(_bstr_t(url),NULL,NULL,NULL,NULL);

		return SUCCEEDED(hr);

	}



	//重载IE事件

	BOOL OnNewWindow2(IDispatch** ppDisp)

	{

		return TRUE;

	}



	void OnDocumentComplete(IDispatch* pDisp, const CComBSTR& szURL)

	{

		IUnknown *pUnk = NULL;

		HRESULT hr=this->QueryControl(__uuidof(IUnknown),(void **)&pUnk);

		ATLASSERT(pUnk);



		LPDISPATCH lpWBDisp = NULL;

		hr = pUnk->QueryInterface(IID_IDispatch, (void**)&lpWBDisp);

		ATLASSERT(SUCCEEDED(hr));

		if (pDisp == lpWBDisp )

		{

			m_requestURL = "";

			m_domain = "";

			::PostMessage(m_parentWnd,MSG_SHOWTREE,(WPARAM)pDisp,(LPARAM)&szURL);

			if(m_isAnalyer)

			{

				m_isAnalyer = FALSE;

				::PostMessage(m_parentWnd,MSG_ANALYSER,(WPARAM)pDisp,(LPARAM)&szURL);

			}

		}

		lpWBDisp->Release();

	}



	string GetDomainUrl(LPCSTR lpUrl)

	{

		string domain;

		LPCSTR lpStart = ::StrStrI(lpUrl,"http://");

		if(lpStart!=NULL)

		{

			lpStart+=7;

			LPCSTR lpEnd = ::StrStrI(lpStart,"/");

			if(lpEnd != NULL)

			{

				lpStart = ::StrStrI(lpStart,".");

				if(lpStart != NULL &&  lpEnd != NULL)

				{

					if(lpStart < lpEnd)

					{

						domain.append((char *)lpStart,lpEnd-lpStart);

					}

				}

			}

		}

		return domain;

	}



	BOOL OnBeforeNavigate2(IDispatch* pDisp, const CComBSTR& szURL, DWORD dwFlags, const CComBSTR& szTargetFrameName, string &postedData, const CComBSTR& szHeaders)

	{

		return FALSE;

	}



	void OnNavigateComplete2(IDispatch* pDisp, const CComBSTR& szURL)

	{

		ATLASSERT(m_URL!=NULL);

		m_requestURL = _bstr_t(GetLocationURL());

		m_URL->SetWindowText(m_requestURL.operator char *());

	}



	void OnStatusTextChange(const CComBSTR szText)

	{

		ATLASSERT(m_StatusBar!=NULL);

		m_StatusBar->SetPaneText(ID_DEFAULT_PANE,_bstr_t(szText));

	}



	void OnProgressChange(long nProgress, long nProgressMax)

	{

		ATLASSERT(m_StatusBar!=NULL);

		CString szText;

		if (nProgressMax>0 && nProgress >0)

		{

			int percentage=(nProgress*100)/nProgressMax;

			if(percentage >100)

				percentage=100;

			else if(percentage<0)

				percentage=0;

			szText.Format(_T("%d%%"),percentage);

		}

		m_StatusBar->SetPaneText(IDR_PROGRESS,szText);

	}

};