windows下WMI使用C++查询用户硬件信息

最近需要做下用户信息统计，发现WMI真是个好东西，同时觉得COM这东西，还真不能少>_<！！

下面是源码：

/********************************************************************

	created:	2014/02/18

	author:		baesky

	purpose:	Gater user infomation

*********************************************************************/

#include <comdef.h>

#include <Wbemidl.h>

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

struct UserInfo

{

	/** your spec*/

};

/** video card and OS */

bool GetUserInfo(UserInfo& Info)

{

	HRESULT hres;

	hres =  CoInitialize( NULL );

	if (FAILED(hres))

	{

		return false;

	}

	hres =  CoInitializeSecurity(

		NULL,

		-1,

		NULL,

		NULL,

		RPC_C_AUTHN_LEVEL_DEFAULT,

		RPC_C_IMP_LEVEL_IMPERSONATE,

		NULL,

		EOAC_NONE,

		NULL

		);

	if (FAILED(hres))

	{

		CoUninitialize();

		return false;

	}

	IWbemLocator *pLoc = NULL;

	hres = CoCreateInstance(

		CLSID_WbemLocator,

		0,

		CLSCTX_INPROC_SERVER,

		IID_IWbemLocator, (LPVOID *) &pLoc);

	if (FAILED(hres))

	{

		CoUninitialize();

		return false;

	}

	IWbemServices *pSvc = NULL;

	hres = pLoc->ConnectServer(

		_bstr_t(L"ROOT\\CIMV2"),

		NULL,

		NULL,

		0,

		NULL,

		0,

		0,

		&pSvc

		);

	if (FAILED(hres))

	{

		pLoc->Release();

		CoUninitialize();

		return false;

	}

	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))

	{

		pSvc->Release();

		pLoc->Release();

		CoUninitialize();

		return false;

	}

	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))

	{

		pSvc->Release();

		pLoc->Release();

		CoUninitialize();

		return false;

	}

	IWbemClassObject *pclsObj;

	ULONG uReturn = 0;

	while (pEnumerator)

	{

		HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,

			&pclsObj, &uReturn);

		if(0 == uReturn)

		{

			break;

		}

		VARIANT vtProp;

		hr = pclsObj->Get(L"Caption", 0, &vtProp, 0, 0);  //os

		//vtProp.bstrVal is what you need.

		//VariantClear(&vtProp);

		//hr = pclsObj->Get(L"CSDVersion", 0, &vtProp, 0, 0); // example "sp3"

		//VariantClear(&vtProp);

		//hr = pclsObj->Get(L"OSArchitecture", 0, &vtProp, 0, 0); // example x64

		//VariantClear(&vtProp);

		pclsObj->Release();

	}

	pEnumerator->Release();

	pEnumerator=NULL;

	hres = pSvc->ExecQuery(

		bstr_t("WQL"),

		bstr_t("SELECT * FROM Win32_VideoController"),

		WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,

		NULL,

		&pEnumerator);

	if (FAILED(hres))

	{

		pSvc->Release();

		pLoc->Release();

		CoUninitialize();

		return false;

	}

	while (pEnumerator)

	{

		HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,

			&pclsObj, &uReturn);

		if(0 == uReturn)

		{

			break;

		}

		VARIANT vtProp;

		hr = pclsObj->Get(L"Caption", 0, &vtProp, 0, 0);  //video desc

                /**

                  .,,,,,,,,,,,,,,,,,,,,,,your logic

                 */

		VariantClear(&vtProp);

		pclsObj->Release();

	}

	pEnumerator->Release();

	pEnumerator=NULL;

	hres = pSvc->ExecQuery(

		bstr_t("WQL"),

		bstr_t("SELECT * FROM Win32_Processor"),

		WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,

		NULL,

		&pEnumerator);

	if (FAILED(hres))

	{

		pSvc->Release();

		pLoc->Release();

		CoUninitialize();

		return false;

	}

	while (pEnumerator)

	{

		HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,

			&pclsObj, &uReturn);

		if(0 == uReturn)

		{

			break;

		}

		VARIANT vtProp;

		hr = pclsObj->Get(L"Name", 0, &vtProp, 0, 0);  //video desc

		 /**

                  .,,,,,,,,,,,,,,,,,,,,,,your logic

                 */

		VariantClear(&vtProp);

		pclsObj->Release();

	}

	pSvc->Release();

	pLoc->Release();

	pEnumerator->Release();

	CoUninitialize();

	return true;

}