Question for nietod

I can't to compile my code.
it is an error://
Del_MFC_APIView.obj : error LNK2001: unresolved external symbol __imp__RpcStringFreeA@4
Del_MFC_APIView.obj : error LNK2001: unresolved external symbol __imp__UuidToStringA@8
Del_MFC_APIView.obj : error LNK2001: unresolved external symbol __imp__UuidCreate@4
Debug/Del_MFC_API.exe : fatal error LNK1120: 3 unresolved externals
Error executing link.exe.
Creating browse info file...

Del_MFC_API.exe - 4 error(s), 0 warning(s)//
why this happend


#include "stdafx.h"
#include <windows.h>
#include <stdio.h>

BOOL GetNicAddress(LPSTR pszNicAddress, UINT nBufSize);
 
int main(int argc, char* argv[])
{
      UINT buffer=0;
      BOOL success=GetNicAddress("eitan",buffer);
      return 0;
}

BOOL GetNicAddress(LPSTR pszNicAddress, UINT nBufSize)
{
  BOOL bSuccess = FALSE;

  //NIC address is 12 character string
  if (nBufSize < 13)
    return FALSE;

  //the way we determine the NIC address is to call the RPC DCE function
  //UuidCreate. The standard format of the GUID returned contains
  //the NIC address in the last 12 characters. The added advantage to
  //this method is that we do not need to rely on a specific network
  //protocol needing to be installed on the client machine to determine
  //the NIC address. You could use this function as the basis for a
  //security scheme for a networked product of yours. Using the NIC address
  //is a guranteed way of uniquely identify a machine throughout the network.

      UUID Uuid;
      RPC_STATUS rpcStatus = UuidCreate(&Uuid);

  if (rpcStatus == RPC_S_OK)
  {
    unsigned char* pszGuid;
    rpcStatus = UuidToString(&Uuid, &pszGuid);
    if (rpcStatus == RPC_S_OK)
    {
      char* pLastMinus = strrchr((char*)pszGuid, '-');
      if (pLastMinus)
      {
        strcpy(pszNicAddress, pLastMinus+1);
        bSuccess = TRUE;
      }

      //need to free created buffer
      RpcStringFree(&pszGuid);
    }
    else
      printf("Error calling UuidToString, Error value is %d\n", rpcStatus);
  }
  else
  printf("Error calling UuidCreate, Error value is %d\n", rpcStatus);

  return bSuccess;
}