thanks. this query is resolves. it is not relate com, it is other question.
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weifirst
@weifirst
Posts
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the question that relate to CreateInstance -
Equivalent for CPtrList in ATLCPtrList is not in c++, it is in vc++
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the question that relate to CreateInstanceThe following code is correct: FRLE_FALSE(m_pRssManager.CreateInstance(RssLib::CLSID_RssManager),_T("can't create RssManager object")); CString sRssDBFile = (LPCTSTR)(GlobalSet::g_sRootPath + _T("\\DB\\RssTab.mrr")); try{ m_pRssManager->Open((LPCTSTR)sRssDBFile); } catch(...) { MessageBox(::AfxGetMainWnd()->m_hWnd, _T("database file is already damaged,will create a new empty database file"),_T("message"),MB_OK|MB_ICONINFORMATION); CString sRssDBTemplateFile = (LPCTSTR)(GlobalSet::g_sRootPath + _T("\\NewRssTab.mrr")); if( ::PathFileExists(sRssDBTemplateFile) ){ ::CopyFile(sRssDBTemplateFile, sRssDBFile, FALSE); RssLib::IRssManagerPtr pRssManager; FRLE_FALSE(pRssManager.CreateInstance(RssLib::CLSID_RssManager),_T("can't create RssManager object")); pRssManager->Open((LPCTSTR)sRssDBFile); m_pRssManager = pRssManager; } } the following code is not correct: FRLE_FALSE(m_pRssManager.CreateInstance(RssLib::CLSID_RssManager),_T("can't create RssManager object")); CString sRssDBFile = (LPCTSTR)(GlobalSet::g_sRootPath + _T("\\DB\\RssTab.mrr")); try{ m_pRssManager->Open((LPCTSTR)sRssDBFile); } catch(...) { MessageBox(::AfxGetMainWnd()->m_hWnd, _T("database file is already damaged,will create a new empty database file"),_T("message"),MB_OK|MB_ICONINFORMATION); CString sRssDBTemplateFile = (LPCTSTR)(GlobalSet::g_sRootPath + _T("\\NewRssTab.mrr")); if( ::PathFileExists(sRssDBTemplateFile) ){ ::CopyFile(sRssDBTemplateFile, sRssDBFile, FALSE); m_pRssManager ->Open((LPCTSTR)sRssDBFile); } } May I ask the reason ? Why have to recreate the RssManager object ? thanks a lot!
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