How to get the SerialNumber of disk driver?

[whiteclouds]

Hi all! Now I am developing an application to read the disk driver's SerialNumber. I want to read it by WMI. The code is as following:

BOOL CData::GetSerialNumber(BYTE* out)
{
BOOL bRet = FALSE;
HRESULT hr;
hr = CoInitializeEx(0, COINIT_MULTITHREADED);
if (FAILED(hr))
{
cout << "Failed to initialize COM library. Error code = 0x"
<< hex << hr << endl;
return bRet;
}
hr = CoInitializeSecurity(
NULL, // Security descriptor
-1, // COM negotiates authentication service
NULL, // Authentication services
NULL, // Reserved
RPC_C_AUTHN_LEVEL_DEFAULT, // Default authentication level for proxies
RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation level for proxies
NULL, // Authentication info
EOAC_NONE, // Additional capabilities of the client or server
NULL); // Reserved

if (FAILED(hr))
{
   cout << "Failed to initialize security. Error code = 0x" 
		<< hex << hr << endl;
   CoUninitialize();
   return bRet;                  // Program has failed.
}
IWbemLocator \*pLoc = 0;

hr = CoCreateInstance(CLSID\_WbemLocator, 0, 
    CLSCTX\_INPROC\_SERVER, IID\_IWbemLocator, (LPVOID \*) &pLoc);

if (FAILED(hr))
{
    cout << "Failed to create IWbemLocator object. Err code = 0x"
         << hex << hr << endl;
    CoUninitialize();
    return bRet;     // Program has failed.
}
IWbemServices \*pSvc = 0;

// Connect to the root\\default namespace with the current user.
hr = pLoc->ConnectServer(
        BSTR(L"ROOT\\\\CIMV2"), 
        NULL, NULL, 0, NULL, 0, 0, &pSvc);

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

cout << "Connected to WMI" << endl;
HRESULT hres;

// Set the proxy so that impersonation of the client occurs.
hres = CoSetProxyBlanket(pSvc,
   RPC\_C\_AUTHN\_WINNT,
   RPC\_C\_AUTHZ\_NONE,
   NULL,
   RPC\_C\_AUTHN\_LEVEL\_CALL,
   RPC\_C\_IMP\_LEVEL\_IMPERSONATE,
   NULL,
   EOAC\_NONE
);

if (FAILED(hres))
{
    cout << "Could not set proxy blanket. Error c

[David Crow]

Other than strID not being null terminated, your code works fine for me.

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