How to get Hardware information?

(In visual C++6)
I want get some information: disk driver(Quantum, Seagate...), and Serial of BIOS...
can you help me!

Thank very much!

This code reads the BIOS serial number using WMI but generates an error i'm unable to resolve. Help needed regarding this.

#include "stdafx.h"
#define _WIN32_DCOM
#include <iostream>
using namespace std;
#include <comdef.h>
#include <Wbemidl.h>

# pragma comment(lib, "wbemuuid.lib")

int main(int argc, char **argv)
{
HRESULT hres;

// Initialize COM.
hres = CoInitializeEx(0, COINIT_MULTITHREADED);
if (FAILED(hres))
{
cout << "Failed to initialize COM library. "
<< "Error code = 0x"
<< hex << hres << endl;
return 1; // Program has failed.
}

// Initialize
hres = CoInitializeSecurity(
NULL,
-1, // COM negotiates service
NULL, // Authentication services
NULL, // Reserved
RPC_C_AUTHN_LEVEL_DEFAULT, // authentication
RPC_C_IMP_LEVEL_IMPERSONATE, // Impersonation
NULL, // Authentication info
EOAC_NONE, // Additional capabilities
NULL // Reserved
);


if (FAILED(hres))
{
cout << "Failed to initialize security. "
<< "Error code = 0x"
<< hex << hres << endl;
CoUninitialize();
return 1; // Program has failed.
}

// Obtain the initial locator to Windows Management
// on a particular host computer.
IWbemLocator *pLoc = 0;

hres = CoCreateInstance(
CLSID_WbemLocator,
0,
CLSCTX_INPROC_SERVER,
IID_IWbemLocator, (LPVOID *) &pLoc);

if (FAILED(hres))
{
cout << "Failed to create IWbemLocator object. "
<< "Error code = 0x"
<< hex << hres << endl;
CoUninitialize();
return 1; // Program has failed.
}

IWbemServices *pSvc = 0;

// Connect to the root\cimv2 namespace with the
// current user and obtain pointer pSvc
// to make IWbemServices calls.

hres = pLoc->ConnectServer(

_bstr_t(L"ROOT\\CIMV2"), // WMI namespace
NULL, // User name
NULL, // User password
0, // Locale
NULL, // Security flags
0, // Authority
0, // Context object
&pSvc // IWbemServices proxy
);

if (FAILED(hres))
{
cout << "Could not connect. Error code = 0x"
<< hex << hres << endl;
pLoc->Release();
CoUninitialize();
return 1; // Program has failed.
}

cout << "Connected to ROOT\\CIMV2 WMI namespace" << endl;

// Set the IWbemServices proxy so that impersonation
// of the user (client) occurs.
hres = CoSetProxyBlanket(

pSvc, // the proxy to set
RPC_C_AUTHN_WINNT, // authentication service
RPC_C_AUTHZ_NONE, // authorization service
NULL, // Server principal name
RPC_C_AUTHN_LEVEL_CALL, // authentication level
RPC_C_IMP_LEVEL_IMPERSONATE, // impersonation level
NULL, // client identity
EOAC_NONE // proxy capabilities
);

if (FAILED(hres))
{
cout << "Could not set proxy blanket. Error code = 0x"
<< hex << hres << endl;
pSvc->Release();
pLoc->Release();
CoUninitialize();
return 1; // Program has failed.
}


// Use the IWbemServices pointer to make requests of WMI.
// Make requests here:

// For example, query for print queues that
// have more than 10 jobs
IEnumWbemClassObject* pEnumerator = NULL;
hres = pSvc->ExecQuery(
bstr_t("WQL"),
bstr_t("SELECT * Win32_BIOS "),
WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
NULL,
&pEnumerator);

if (FAILED(hres))
{
cout << "Query for print queues failed. "
<< "Error code = 0x"
<< hex << hres << endl;
pSvc->Release();
pLoc->Release();
CoUninitialize();
return 1; // Program has failed.
}
else
{
do
{
IWbemClassObject* pInstance = NULL;
ULONG dwCount = NULL;

hres = pEnumerator->Next(
WBEM_INFINITE,
1,
&pInstance,
&dwCount);

} while (hres == WBEM_S_NO_ERROR);

}

VARIANT v;

IWbemClassObject * pClassObject = NULL;
BSTR strClassProp = SysAllocString(L"Serial Number");
hres = pClassObject->Get(strClassProp, 0, &v, 0, 0);
SysFreeString(strClassProp);

_bstr_t bstrPath = &v; //Just to convert BSTR to ANSI


char* strPath=(char*)bstrPath;
if (SUCCEEDED(hres))
printf (strPath);
else
printf ("Error in getting object");
VariantClear( &v );

// Cleanup
// ========

pSvc->Release();
pLoc->Release();
CoUninitialize();



return 0; // Program successfully completed.
}

I've been battling around trying to implement WMI into my MFC application. I'm trying to get Windows XP informations such as product key, activation status, ect. I used COM init to interface with Win32_WindowsProductActivation class. I have problems with changing Windows XP Product Key. How can I run SetProductKey method with parameters??? I went through Microsoft docs but it's not clear to me at all. Any hits or sample code??? I've seen VB script but i have difficulty implementing it with C++.
Thank you all