#include <comutil.h>  
#include <Wbemidl.h>  
#include <algorithm>  
#include <atlconv.h>  
#include <ntddndis.h>
#pragma comment (lib, "comsuppw.lib")  
#pragma comment (lib, "wbemuuid.lib") 
int main(void)   //主函式，程式的入口   
{
	USES_CONVERSION;
	HRESULT hres;  
	INT iTotal = 0;  

	// 初始化COM  
	hres = CoInitializeEx( NULL, COINIT_MULTITHREADED );   
	if( FAILED(hres) )  
	{  
		return -2;  
	}  

	// 設定COM的安全認證級別  
	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 -2;  
	}  

	// 獲得WMI連線COM介面  
	IWbemLocator *pLoc = NULL;  
	hres = CoCreateInstance(   
		CLSID_WbemLocator,               
		NULL,   
		CLSCTX_INPROC_SERVER,   
		IID_IWbemLocator,  
		reinterpret_cast<LPVOID*>(&pLoc)  
		);   
	if( FAILED(hres) )  
	{  
		CoUninitialize();  
		return -2;  
	}  

	// 通過連線介面連線WMI的核心物件名"ROOT//CIMV2"  
	IWbemServices *pSvc = NULL;  
	hres = pLoc->ConnectServer(  
		_bstr_t( L"ROOT\\CIMV2" ),  
		NULL,  
		NULL,  
		NULL,  
		0,  
		NULL,  
		NULL,  
		&pSvc  
		);      
	if( FAILED(hres) )  
	{  
		pLoc->Release();   
		CoUninitialize();  
		return -2;  
	}  

	// 設定請求代理的安全級別  
	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 -2;  
	}  

	// 通過請求代理來向WMI傳送請求  
	IEnumWbemClassObject *pEnumerator = NULL;  
	hres = pSvc->ExecQuery(  
		bstr_t("WQL"),   
		bstr_t( "SELECT *  FROM Win32_NetworkAdapter where NetConnectionStatus =2" ),  
		WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,   
		NULL,  
		&pEnumerator  
		);  
	if( FAILED(hres) )  
	{  
		pSvc->Release();  
		pLoc->Release();  
		CoUninitialize();  
		return -3;  
	}  

	// 迴圈列舉所有的結果物件    
	while( pEnumerator )  
	{  
		IWbemClassObject *pclsObj = NULL;  
		ULONG uReturn = 0;
		pEnumerator->Next(  
			WBEM_INFINITE,  
			1,   
			&pclsObj,  
			&uReturn  
			);  

		if( uReturn == 0 )  
		{  
			break;  
		}  

		// 獲取屬性值  
		VARIANT vtProperty;  

		VariantInit( &vtProperty );   
		pclsObj->Get( bstr_t("Name"), 0, &vtProperty, NULL, NULL );  
		printf("%s\n", W2A(vtProperty.bstrVal));
		
		VariantClear( &vtProperty );
		pclsObj->Release();  
	} // End While  

	// 釋放資源  
	pEnumerator->Release();  
	pSvc->Release();  
	pLoc->Release();      
	CoUninitialize();
	return 0;
}