"C + +" made DLL

(1). h

You need to refer to the other. h

extern "C" int32_t __declspec (dllexport) Encode (const general::P rotocol::jtt_808_2011::cmsg0001::smsg &msg, uint8 _t *dstdata, uint32_t Dstdatamaxlen);

(2). cpp

extern "C" int32_t __declspec (dllexport) Encode (const general::P rotocol::jtt_808_2011::cmsg0001::smsg &msg, uint8 _t *dstdata, uint32_t Dstdatamaxlen)

{

int32_t result = General::P rotocol::jtt_808_2011::cmsg0001::encode (msg, dstdata, Dstdatamaxlen);

return result;

}