Error in using GetPorcAddress() in c++

See more:

C++

DLL

Hi
In the code:

HINSTANCE hinDLL;
hinDLL = LoadLibrary((LPCWSTR("WinSCard.dll"));
if (hinDLL != 0)
    {
              context=(EstablishContext) GetProcAddress(hinDLL,"SCardEstablishContext");

              listreaders=(ListReaders) GetProcAddress(hinDLL,"SCardListReaders");

              sconnect=(Connect) GetProcAddress(hinDLL,"SCardConnect");

              }
else{
     cout<<"Library failed to load\n";
     }
}

m getting values in hinDLL and context but getting undefined values in listreaders and sconnect.
Does GetProcAddress allow its use like i have done??