wmi Process GetUser

   HRESULT hr;
	//initialize com
	hr=CoInitialize(0);
	//Obtain the initial locator to WMI
	hr = CoCreateInstance(CLSID_WbemLocator,0,CLSCTX_INPROC_SERVER,IID_IWbemLocator,(LPVOID*)&m_pLoc);
    //Connect to the local root/cimv2 namespace and obtain pointer pSvc to make IWbemServices calls
	hr = m_pLoc->ConnectServer( L"ROOT\\CIMV2",NULL,NULL, 0, NULL,0,0,&m_pServ );
	//Set security levels for the proxy
	hr = CoSetProxyBlanket(
       m_pServ,                        
       RPC_C_AUTHN_WINNT,            
       RPC_C_AUTHZ_NONE,             
       NULL,                         
       RPC_C_AUTHN_LEVEL_CALL,       
       RPC_C_IMP_LEVEL_IMPERSONATE, 
       NULL,                        
       EOAC_NONE                     
       );
	 //WQL
	CString sQuery=L"SELECT * FROM Win32_Process";
	IEnumWbemClassObject* pEnumerator = NULL;
    HRESULT hr = m_pServ->ExecQuery(
        L"WQL",
        sQuery.AllocSysString(),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
        NULL,
        &pEnumerator);	 
	
	
	IWbemClassObject *pclsObj;
    ULONG uReturn = 0;
	
    while (pEnumerator)
    {
        // next obj
        hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);
        if(0 == uReturn)
           break;
       
        VARIANT vtProp;
       	//Name
		hr=pclsObj->Get(L"Name", 0, &vtProp, 0, 0);
        //here get the Name,and it works
		VariantClear(&vtProp);
		
		//owner
		IWbemClassObject* pOutParams = NULL;
		hr=m_pServ->ExecMethod(L"Win32_Process",L"GetOwner",0,NULL,NULL,&pOutParams,0);
		
/*    T_T    

here is the error ,and hr is 8004102f  ,the error means "Parameters provided for the method are invalid "
  
*/
		
}