CuDllManager - Retrieves the address of an exported function or variable from the specified dynamic-link library (DLL).

// Retrieves the address of an exported function or variable from the specified dynamic-link library (DLL).


typedef void (* LPFN_MYFUNCTION)(void);
LPFN_MYFUNCTION lpfnMyFunction;

CuDllManager DllManager;

BOOL bLoadDll = DllManager.LoadLibrary(L"dllfile.dll");
lpfnMyFunction = (LPFN_MYFUNCTION)DllManager.GetProcAddress("MyFunction");

// CuDllManager.h

class CuDllManager
{
private:
    HINSTANCE m_hinstDll;

public:

    virtual FARPROC GetProcAddress(LPCSTR lpProcName);

    virtual void FreeLibrary();
    virtual BOOL LoadLibrary(LPCTSTR szLibrary);

    CuDllManager();
    virtual ~CuDllManager();

};




// CuDllManager.cpp

CuDllManager::CuDllManager()
{
    m_hinstDll = NULL;
}

CuDllManager::~CuDllManager()
{
    FreeLibrary();
}

BOOL CuDllManager::LoadLibrary(LPCTSTR szLibrary)
{
    FreeLibrary();
    m_hinstDll = ::LoadLibrary(szLibrary);
    return (BOOL)m_hinstDll != NULL;
}

void CuDllManager::FreeLibrary()
{
    if( m_hinstDll != NULL )
    {
        ::FreeLibrary(m_hinstDll);
        m_hinstDll = NULL;
    }
}

FARPROC CuDllManager::GetProcAddress(LPCSTR lpProcName)
{
    return ::GetProcAddress(m_hinstDll, lpProcName);
}