C++ ACE 动态加载链接库

#include <ace/DLL.h>
#include <ace/DLL_Manager.h>

typedef long (*PFN_TEST)(const char* szName);
PFN_TEST        g_pfnTest = NULL;

    ACE_TCHAR szDName[128] = { 0 }; 
    strncpy(szDName, D_NAME, 128);    

    ACE_DLL m_hD;
    int nRet = m_hD.open(szDName);
    if(nRet != 0)
    {
        cout << "ERROR." << endl;
        m_hD.close();
        return nRet;
    }

g_pfnTest = (PFN_TEST)m_hD.symbol("Test");

    if(g_pfnTest != NULL)
    { 
        g_pfnTest ("wjshan0808");
    }