LPCSTR szFunction = "DllRegisterServer";
HRESULT hr = S_OK;
HMODULE hMod = LoadLibrary(szDll);
typedef HRESULT (_stdcall *DLLPROC)();
DLLPROC pfnDllProc = reinterpret_cast<DLLPROC>(GetProcAddress(hMod, szFunction));
hr = (*pfnDllProc)();
这样注册,hr == 0表示成 功, 否则失败