No, I don't want you to waste any more time, if you can tell me what to do, that would be enough. Since there is no other alternative, I have to compile the code and continue. maybe I can find the conversion dll for the SDK itself. So I have to deal with it somehow.     HMODULE hDLL = LoadLibraryW(L"HCNetSDK.dll");     if (hDLL)     {         Type_SetStandardDataCallBack installFunc = (Type_SetStandardDataCallBack)GetProcAddress(hDLL, "NET_DVR_SetStandardDataCallBack");