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【C】获取系统信息及性能信息
作者:汶纡 / 发布于2014/11/18/ 608

	#ifndef MY_WMI_CLASS_H__
	#define MY_WMI_CLASS_H__
	
	/*******************************************************************************
	* @file
	* @author def< qq group: 324164944 >
	* @blog http://www.cnblogs.com/itdef/
	* @brief
	/*******************************************************************************/
	
	#include <Wbemidl.h>
	
	
	namespace DEF
	{
	class CWMI
	{
	 IWbemLocator *pLoc_;
	 IWbemServices *pSvc_;
	
	public:
	 CWMI():pLoc_(NULL),pSvc_(NULL){}
	 ~CWMI();
	 BOOL QueryInfo(const char* strSQL, const char* strAttr );
	 BOOL Initialize();
	
	
	
	};
	
	
	} //namespace DEF
	
	
	
	
	#endif //MY_WMI_CLASS_H__

	

	

	/*******************************************************************************
	* @file
	* @author def< qq group: 324164944 >
	* @blog http://www.cnblogs.com/itdef/
	* @brief
	/*******************************************************************************/
	
	#include "CMyWMIClass.h"
	#include <iostream>
	#include <comutil.h>
	
	using namespace DEF;
	using namespace std;
	
	#pragma comment(lib,"Wbemuuid")
	#pragma comment(lib,"comsuppw")
	
	
	BOOL CWMI::Initialize()
	{
	 BOOL bRet = FALSE;
	 HRESULT hres; //定义COM调用的返回
	
	 try{
	 hres = CoInitializeEx(0, COINIT_MULTITHREADED);
	 if (FAILED(hres))
	 {
	 throw exception("CoInitializeEx() error.");
	 }
	
	 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))
	 {
	 throw exception("CoInitializeEx() error.");
	 }
	
	 hres = CoCreateInstance(
	 CLSID_WbemLocator,
	 0,
	 CLSCTX_INPROC_SERVER,
	 IID_IWbemLocator, (LPVOID *) &pLoc_);
	 if (FAILED(hres))
	 {
	 throw exception("CoCreateInstance() error.");
	 }
	
	 // 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 (e.g. Kerberos)
	 0, // Context object
	 &pSvc_ // pointer to IWbemServices proxy
	 );
	
	 if (FAILED(hres))
	 {
	 throw exception("ConnectServer() error.");
	 }
	
	 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))
	 {
	 throw exception("CoSetProxyBlanket() error.");
	 }
	
	
	 bRet = TRUE;
	 }catch(exception& e)
	 {
	 cout << e.what() << endl;
	 }
	 return bRet;
	}
	
	CWMI::~CWMI()
	{
	 if( NULL != pSvc_)
	 {
	 pSvc_->Release();
	 pSvc_ = NULL;
	 }
	 if(pLoc_ != NULL )
	 {
	 pLoc_->Release();
	 pLoc_ = NULL;
	 }
	 CoUninitialize();
	}
	
	
	BOOL CWMI::QueryInfo(const char* strSQL, const char* strAttr )
	{
	 HRESULT hres; //定义COM调用的返回
	 IWbemClassObject* pclsObj = NULL;
	 IEnumWbemClassObject* pEnum = NULL;
	 BOOL bRet = FALSE;
	
	 if( NULL == strSQL ||
	 NULL == strAttr)
	 {
	 return FALSE;
	 }
	
	 try{
	 hres = pSvc_->ExecQuery(
	 bstr_t("WQL"),
	 bstr_t(strSQL),
	 WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
	 NULL,
	 &pEnum);
	
	 if (FAILED(hres))
	 {
	 throw exception("ExecQuery() error.");
	 }
	
	 ULONG uReturn = 0;
	 while( pEnum )
	 {
	 HRESULT hr = pEnum->Next( WBEM_INFINITE, 1, &pclsObj, &uReturn );
	 if( 0 == uReturn )
	 {
	 break;
	 }
	 VARIANT vtProp;
	 VariantInit( &vtProp );
	
	 hr = pclsObj->Get( bstr_t( strAttr ), 0, &vtProp, 0, 0 );
	 if (SUCCEEDED(hr) && (V_VT(&vtProp) == VT_BSTR))
	 {
	 char* str = _com_util::ConvertBSTRToString( vtProp.bstrVal );
	 //printf( "%s, length = %d \n", str, strlen( str ) );
	 printf("%s \n",str);
	 delete [] str;
	 }
	 VariantClear( &vtProp );
	 }
	
	
	 bRet = TRUE;
	 }catch(exception& e)
	 {
	 cout << e.what() << endl;
	 }
	 if(pclsObj != NULL)
	 {
	 pclsObj->Release();
	 pclsObj = NULL;
	 }
	 if(pEnum != NULL)
	 {
	 pEnum->Release();
	 pEnum = NULL;
	 }
	 return bRet;
	}

	

	/*******************************************************************************
	* @file
	* @author def< qq group: 324164944 >
	* @blog http://www.cnblogs.com/itdef/
	* @brief
	/*******************************************************************************/
	
	#include <iostream>
	#include "CMyWMIClass.h"
	
	using namespace std;
	
	int _tmain(int argc, _TCHAR* argv[])
	{
	 while(1)
	 {
	 Sleep(3000);
	 DEF::CWMI a;
	 a.Initialize();
	
	 cout << endl << "Caption ";
	 a.QueryInfo("SELECT * FROM Win32_OperatingSystem","Caption");
	
	 cout << "Manufacturer ";
	 a.QueryInfo("SELECT * FROM Win32_OperatingSystem","Manufacturer");
	
	 cout << "CSName ";
	 a.QueryInfo("SELECT * FROM Win32_OperatingSystem","CSName");
	
	
	 cout << "PNPDeviceID ";
	 a.QueryInfo("SELECT * FROM Win32_DiskDrive", "PNPDeviceID");
	
	 cout << "Disk SerialNumber ";
	 a.QueryInfo("SELECT * FROM Win32_PhysicalMedia", "SerialNumber");
	
	 cout << "TotalVisibleMemorySize ";
	 a.QueryInfo("SELECT * FROM Win32_OperatingSystem","TotalVisibleMemorySize");
	
	 cout << "FreePhysicalMemory ";
	 a.QueryInfo("SELECT * FROM Win32_OperatingSystem","FreePhysicalMemory");
	
	
	 cout << "SerialNumber ";
	 a.QueryInfo("SELECT * FROM Win32_DiskDrive","SerialNumber");
	
	
	
	// cout << "Process Caption ";
	// a.QueryInfo("SELECT * FROM Win32_Process","Caption");
	//
	// cout << "Process Handle ";
	// a.QueryInfo("SELECT * FROM Win32_Process","Handle");
	//
	//
	// cout << "Process ExecutablePath ";
	// a.QueryInfo("SELECT * FROM Win32_Process","ExecutablePath");
	
	
	 }
	
	
	 return 0;
	}
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