Как получить данные системы Windows через WMI на C++

Использование WMI для получения данных системы Windows

Образец кода на C++ для использования WMI для получения данных системы Windows

Образец файла для получения информации на C++:
• 
  #define _WIN32_DCOM
  #include
  using namespace std;
  #include
  #include

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


• int main(int argc, char** argv)
{


• 
  HRESULT hres;

  // Step 1: --------------------------------------------------
  // 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. }
• 
  // Step 2: --------------------------------------------------
  // Set general COM security levels --------------------------

  hres = CoInitializeSecurity(
  NULL,
  -1, // COM authentication
  NULL, // Authentication services
  NULL, // Reserved
  RPC_C_AUTHN_LEVEL_DEFAULT, // Default authentication
  RPC_C_IMP_LEVEL_IMPERSONATE, // Default 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. }

• 
  // Step 3: ---------------------------------------------------
  // Obtain the initial locator to WMI -------------------------

  IWbemLocator* pLoc = NULL;

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

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

• 
  // Step 4: -----------------------------------------------------
  // Connect to WMI through the IWbemLocator::ConnectServer method

  IWbemServices* pSvc = NULL;

  // 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"), // Object path of WMI namespace
  NULL, // User name. NULL = current user
  NULL, // User password. NULL = current
  0, // Locale. NULL indicates current
  NULL, // Security flags.
  0, // Authority (for example, Kerberos)
  0, // Context object
  &pSvc // pointer to 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;

• 
  // Step 5: --------------------------------------------------
  // Set security levels on the proxy -------------------------

  hres = CoSetProxyBlanket(
  pSvc, // Indicates the proxy to set
  RPC_C_AUTHN_WINNT, // RPC_C_AUTHN_xxx
  RPC_C_AUTHZ_NONE, // RPC_C_AUTHZ_xxx
  NULL, // Server principal name
  RPC_C_AUTHN_LEVEL_CALL, // RPC_C_AUTHN_LEVEL_xxx
  RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
  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.
}


• 
  // Step 6: --------------------------------------------------
  // Use the IWbemServices pointer to make requests of WMI ----

  // For example, get the name of the operating system
  IEnumWbemClassObject* pEnumerator = NULL;
  hres = pSvc->ExecQuery(
  bstr_t("WQL"),
  bstr_t("SELECT * FROM Win32_OperatingSystem"),
  WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
  NULL,
  &pEnumerator);

  if (FAILED(hres))
{
cout << "Query for operating system name failed." << " Error code = 0x" << hex << hres << endl; pSvc->Release();
pLoc->Release();
CoUninitialize();
return 1; // Program has failed.
}


• 
  // Step 7: -------------------------------------------------
  // Get the data from the query in step 6 -------------------

  IWbemClassObject* pclsObj = NULL;
  ULONG uReturn = 0;

  while (pEnumerator)
  {
  HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,
  &pclsObj, &uReturn);

  if (0 == uReturn)
  {
  break;
  }

  VARIANT vtProp;

  // Get the value of the property

  //изменение и тестирование выводимой информации
  hr = pclsObj->Get(L"BootDevice", 0, &vtProp, 0, 0);
  wcout << "Displayed : " << vtProp.bstrVal << endl; VariantClear(&vtProp); pclsObj->Release();
  }

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

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

  return 0; // Program successfully completed.

  }

  //для тестирования получаемых данных системы


Некоторые получаемые данные

/*выводит, если указать значение в L"...":
BootDevice- \Device\HarddiskVolume2
BuildNumber- 17134
BuildType- Multiprocessor Free
CodeSet- 1251
CountryCode- 7
CreationClassName- Win32_OperatingSystem
CSCreationClassName- Win32_ComputerSystem
CSName- MISHANYA
FreePhysicalMemory- 774284
FreeSpaceInPagingFiles- 4113200
FreeVirtualMemory- 4414056
InstallDate- 20180624212158.000000+180
LastBootUpTime- 20190814104755.283745+180
LocalDateTime- 20190814170745.643000+180
Locale- 0419
Manufacturer- Microsoft Corporation
MaxProcessMemorySize- 137438953344
OSArchitecture- 64-
SerialNumber- 00327-60000-00000-AA321
SizeStoredInPagingFiles- 4193280
Status- OK
SystemDevice- \Device\HarddiskVolume4
SystemDirectory- C:\WINDOWS\system32
SystemDrive- C:
TotalVirtualMemorySize- 8266728
TotalVisibleMemorySize- 4073448
Version- 10.0.17134
WindowsDirectory- C:\WINDOWS
Caption-
Description-
Name-
*/