m_hSTKDrv = AfxLoadLibrary( filePath );

    if( !m_hSTKDrv )
        return;
    m_pfnStock_Init = \
            (int (WINAPI *)(HWND,UINT,int)) GetProcAddress(m_hSTKDrv,"Stock_Init");
    m_pfnStock_Quit = \
            (int (WINAPI *)(HWND)) GetProcAddress(m_hSTKDrv,"Stock_Quit");
    m_pfnGetTotalNumber = \
            (int (WINAPI *)())GetProcAddress(m_hSTKDrv,"GetTotalNumber");
    m_pfnSetupReceiver = \
            (int    (WINAPI *)(BOOL))GetProcAddress(m_hSTKDrv,"SetupReceiver");
    m_pfnGetStockDrvInfo = \
            (DWORD (WINAPI *)(int,void * ))GetProcAddress(m_hSTKDrv,"GetStockDrvInfo");
    m_pfnGetStockByNoEx=\
            (int (WINAPI *)(int,RCV_HANGQING_STRUCTEx *))GetProcAddress(m_hSTKDrv,"GetStockByNoEx");
    m_pfnGetStockByCodeEx=\
            (int (WINAPI *)(char *,int,RCV_HANGQING_STRUCTEx *))GetProcAddress(m_hSTKDrv,"GetStockByCodeEx");
m_hSTKDrv=0，直接就返回了。
或者我写成    m_hSTKDrv = AfxLoadLibrary( "C:\\sc\\SCStock.dll" );了之后m_hSTKDrv有值，但是m_pfnGetStockByCodeEx，m_pfnGetStockByNoEx，m_pfnGetStockDrvInfo ，m_pfnSetupReceiver，m_pfnGetTotalNumber都为0，这是怎么回事呢

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