identifier not found error, undeclared identifier

Hi,
I have this code that I am trying to compile, but I am getting the
following errors

'CoInitializeSecurity': identifier not found
'EOAC_NONE' : undeclared identifier

I have pasted the code below

// Using_WMI1.cpp : Defines the entry point for the console
application.
//

#include "stdafx.h"
#include "wbemidl.h"
#include <comdef.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

void OnButtonGetinfo()
{
    // TODO: Add your control notification handler code here
    CoInitialize(NULL);

    //Security needs to be initialized in XP first and this was the major
problem
    //why it was not working in XP.

    if(CoInitializeSecurity( NULL,
        -1,
        NULL,
        NULL,
        RPC_C_AUTHN_LEVEL_PKT,
        RPC_C_IMP_LEVEL_IMPERSONATE,
        NULL,
        EOAC_NONE,
        0)
        != S_OK)
        return;

    IWbemLocator * pIWbemLocator = NULL;
    IWbemServices * pWbemServices = NULL;
    IEnumWbemClassObject * pEnumObject = NULL;

    BSTR bstrNamespace = (L"root\\cimv2");

    if(CoCreateInstance (
            CLSID_WbemAdministrativeLocator,
            NULL ,
            CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER ,
            IID_IUnknown ,
            ( void ** ) & pIWbemLocator
            ) != S_OK)
                return;

    if(pIWbemLocator->ConnectServer(
                bstrNamespace, // Namespace
                NULL, // Userid
                NULL, // PW
                NULL, // Locale
                0, // flags
                NULL, // Authority
                NULL, // Context
                &pWbemServices
                ) != S_OK)
                return;

    HRESULT hRes;
// BSTR strQuery = (L"Select * from win32_Processor");
    BSTR strQuery = (L"SELECT * FROM Win32_OperatingSystem");
// BSTR strQuery = (L"SELECT Name, ProcessId, Caption, ExecutablePath"
FROM Win32_Process");

// BSTR strQuery = (L"SELECT * FROM Win32_Process");

    BSTR strQL = (L"WQL");
    hRes = pWbemServices-
    
if(hRes != S_OK)
    {
        printf("Could not execute Query");
        return;
    }

    ULONG uCount = 1, uReturned;
    IWbemClassObject * pClassObject = NULL;

    hRes = pEnumObject->Reset();

    if(hRes != S_OK)
    {
        printf("Could not Enumerate");
        return;
    }

    hRes = pEnumObject->Next(WBEM_INFINITE,uCount, &pClassObject,
&uReturned);
    if(hRes != S_OK)
    {
        printf("Could not Enumerate");
        return;
    }

    VARIANT v1;
    BSTR strClassProp = SysAllocString(L"NumberOfProcesses");
    hRes = pClassObject->Get(strClassProp, 0, &v1, 0, 0);

    if(hRes != S_OK)
    {
        printf("Could not Get Value");
        return;
    }

    SysFreeString(strClassProp);

    _bstr_t bstrPath = &v1; //Just to convert BSTR to ANSI
    char* strPath=(char*)bstrPath;

    if (SUCCEEDED(hRes))
        printf(strPath);
    else
        printf("Error in getting object");

    VariantClear( &v1 );

    pIWbemLocator->Release();
    pWbemServices->Release();
    pEnumObject->Release();
    pClassObject->Release();
    CoUninitialize();

}
int _tmain(int argc, _TCHAR* argv[])
{
    OnButtonGetinfo();
    return 0;
}

Any help I can get will be appreciated. Thanks