Cannot compile

Hi All,

I have downloaded the following code to get the machine name and PDC from
MSDN. Unfortunlately, the compilation is failed.

#include <activeds.h>
#include <stdio.h>

int main()
{
   HRESULT hr;

   hr = CoInitialize(NULL);

    IADsWinNTSystemInfo *pNtSys;
    hr = CoCreateInstance(CLSID_WinNTSystemInfo,
                          NULL,
                          CLSCTX_INPROC_SERVER,
                          IID_IADsWinNTSystemInfo,
                          (void**) &pNtSys);

   BSTR bstr;
   hr = pNtSys->get_UserName(&bstr);
   if (SUCCEEDED(hr)) {
      printf("User: %S\n", bstr);
      SysFreeString(bstr);
   }

   hr = pNtSys->get_ComputerName(&bstr);
   if (SUCCEEDED(hr)) {
      printf("Computer: %S\n", bstr);
      SysFreeString(bstr);
   }

   hr = pNtSys->get_DomainName(&bstr);
   if (SUCCEEDED(hr)) {
      printf("Domain: %S\n", bstr);
      SysFreeString(bstr);
   }

   hr = pNtSys->get_PDC(&bstr);
   if (SUCCEEDED(hr)) {
      printf("PDC: %S\n", bstr);
      SysFreeString(bstr);
   }

   if(pNtSys) {
      pNtSys->Release();
   }

   CoUninitialize();
   return 0;
}

The error message is :-
Linking...
adscode.obj : error LNK2019: unresolved external symbol
__imp__CoUninitialize@0 referenced in function _main
adscode.obj : error LNK2019: unresolved external symbol
__imp__SysFreeString@4 referenced in function _main
adscode.obj : error LNK2019: unresolved external symbol
__imp__CoCreateInstance@20 referenced in function _main
adscode.obj : error LNK2001: unresolved external symbol
_CLSID_WinNTSystemInfo
adscode.obj : error LNK2001: unresolved external symbol
_IID_IADsWinNTSystemInfo
adscode.obj : error LNK2019: unresolved external symbol
__imp__CoInitialize@4 referenced in function _main
D:\VCExpress\ads\Debug\ads.exe : fatal error LNK1120: 6 unresolved externals

Thanks