检测网页是否可以打开, 再使用IE打开网页

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//检测是否能连接网页 BOOL CanLinkWebPage(string strUrl) {     /*clock_t start, finish;     double duration;     start = clock();     char buf[100];*/     //使用mfc的CHttpFile来检测     BOOL CanLink = FALSE;     CInternetSession session("HttpClient");     session.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, 5000);      // 5000毫秒的连接超时     session.SetOption(INTERNET_OPTION_SEND_TIMEOUT, 5000);           // 5000毫秒的发送超时     session.SetOption(INTERNET_OPTION_RECEIVE_TIMEOUT, 5000);        // 5000毫秒的接收超时     session.SetOption(INTERNET_OPTION_DATA_SEND_TIMEOUT, 5000);     // 5000毫秒的发送超时     session.SetOption(INTERNET_OPTION_DATA_RECEIVE_TIMEOUT, 5000);       // 5000毫秒的接收超时     session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1);          // 1次重试     try     {         CHttpFile* pFile = (CHttpFile*)session.OpenURL(strUrl.c_str(), 1, INTERNET_FLAG_RELOAD | INTERNET_FLAG_TRANSFER_BINARY);         DWORD dwStatusCode;           pFile-> QueryInfoStatusCode(dwStatusCode);         /*sprintf_s(buf, "%s返回状态码是:%lu", strUrl.c_str(), dwStatusCode);         UpdateDebugLogToFile(buf);*/         //200 302 206状态码都可以         if(dwStatusCode == HTTP_STATUS_OK || dwStatusCode == HTTP_STATUS_REDIRECT || dwStatusCode == HTTP_STATUS_PARTIAL_CONTENT)             CanLink = TRUE;         pFile -> Close();         delete pFile;     }     catch (CException* e)     {         e->Delete();     }     session.Close();     /*finish = clock();     duration = (double)(finish - start) / CLOCKS_PER_SEC;     sprintf_s(buf, "%s%s%f%s, CanLink值:%d", strUrl.c_str()," 连接时间: ", duration, "秒", CanLink);     UpdateDebugLogToFile(buf);*/     return CanLink; } //测试几个URL的速度 unsigned __stdcall TestUrlSpeed(void* _pParam) {     string _Url;     string* _pStr = (string*)_pParam;     if (_pStr) {         _Url = *_pStr;         if(_pStr != NULL)         {             delete _pStr;             _pStr = NULL;         }     }     if(CanLinkWebPage(_Url))         return 1;     else         return 0; } // 打开网页 unsigned __stdcall OpenUrlUseIEThread(void* _pParam) {     string _Url;     string* _pStr = (string*)_pParam;     if (_pStr) {         _Url = *_pStr;         SAFE_DELETE(_pStr);     }     if (!_Url.empty()) {         vector<string> _UrlList;         CVarTypeCvt::split_by(_Url,_UrlList,';');         vector<string> urls;         for (INT _Idx = 0; _Idx < (INT)_UrlList.size(); _Idx++) {             _Url = _UrlList[_Idx];             CVarTypeCvt::trim(_Url," \t\r\n");             /*if (!_Url.empty() && CanOpenWebPage(_Url)) {                 ::ShellExecute(NULL, "open",_Url.c_str(), NULL, NULL, SW_SHOWNORMAL);                 break;             }*/             if (!_Url.empty()) {                 urls.push_back(_Url);             }         }         HANDLE* pHandles = new HANDLE[urls.size()];         for(int i = 0; i < urls.size(); ++i)         {             unsigned _ThreadID;             HANDLE _hThread = (HANDLE)_beginthreadex(NULL,NULL,TestUrlSpeed,(void*)new string(urls[i]),NULL,&_ThreadID);                           pHandles[i] = _hThread;         }         DWORD dw = WaitForMultipleObjects(urls.size(), pHandles, FALSE, 10000);         if(dw != WAIT_FAILED && dw != WAIT_TIMEOUT)         {             DWORD dwRet;             GetExitCodeThread(pHandles[dw - WAIT_OBJECT_0], &dwRet);             if(dwRet)             {                 ::ShellExecute(NULL, "open",urls[dw - WAIT_OBJECT_0].c_str(), NULL, NULL, SW_SHOWNORMAL);             }         }         for(int i = 0; i < urls.size(); ++i)         {             if(pHandles[i] != NULL)             {                 CloseHandle(pHandles[i]);                 pHandles[i] = NULL;             }         }         delete [] pHandles;         pHandles = NULL;     }     return 0; } void OpenUrlUseIE(string _Url, BOOL _Async = TRUE) {     if (_Url.empty()) return;     if (_Async) {         unsigned _ThreadID;         HANDLE _hThread = (HANDLE)_beginthreadex(NULL,NULL,OpenUrlUseIEThread,(void*)new string(_Url),NULL,&_ThreadID);         CloseHandle(_hThread);         _hThread = NULL;     }     else {         ::ShellExecute(NULL, "open",_Url.c_str(), NULL, NULL, SW_SHOWNORMAL);     } }