Win32_operatingsystem for WMI Programming

# Include <iostream>
# Include <comdef. h>
# Include <wbemidl. h>

# Include <atlbase. h>
# Include <atlstr. h>

# Pragma comment (Lib, "wbemuuid. lib ")

Create a common console project and Add ATL support

//
// Initialize com
//
Hresult hres;

Hres = coinitializeex (0, coinit_multithreaded );
If (failed (hres ))
{
Return 1; // program has failed.
}

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 Couninitialize ();
Return 1; // program has failed.
}

//
// Cocreateinstance creates a locator instance.
//
Ccomqiptr <iwbemlocator> ploc;

Hres = cocreateinstance (
Clsid_wbemlocator,
0,
Clsctx_inproc_server,
Iid_iwbemlocator, (lpvoid *) & ploc );

If (failed (hres ))
{
Couninitialize ();
Return 1; // program has failed.
}

//
// Connect to the "root/cimv2" namespace to obtain the iwbemservices pointer.
//
Ccomqiptr <iwbemservices> psvc;

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 ))
{
Couninitialize ();
Return 1; // program has failed.
}

//
// Sets the iwbemservices proxy security, so that the WMI Service is equivalent to the client
//
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 ))
{
Couninitialize ();
Return 1;
}

//
// Use the iwbemservices pointer to request WMI to obtain information about the operating system
//
Ccomqiptr <ienumwbemclassobject> penumerator;

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 ))
{
Couninitialize ();
Return 1; // program has failed.
}

//
// Display WQL query data
//
 
Ulong ureturn = 0;

While (penumerator)
{

Ccomqiptr <iwbemclassobject> pclsobj;
Hresult hR = penumerator-> next (wbem_infinite, 1, & pclsobj, & ureturn );
If (0 = ureturn)
{
Break;
}

_ Variant_t vtprop;

// Obtain the operating system name
HR = pclsobj-> get (L "name", 0, & vtprop, 0, 0 );
// Obtain the system startup Partition
Pclsobj-> get (L "bootdevice", 0, & vtprop, 0, 0 );
// Obtain the number of processes currently running
Pclsobj-> get (L "numberofprocesses", 0, & vtprop, 0, 0 );
// Obtain the serial number of the Operating System
Pclsobj-> get (L "serialnumber", 0, & vtprop, 0, 0 );
 // Obtain the language of the Operating System
Pclsobj-> get (L "oslanguage", 0, & vtprop, 0, 0 );
//
// This attribute cannot be set because it is read-only.
// Vtprop. lval = 0x0809;
// Pclsobj-> put (L "oslanguage", 0/* Reserved */, & vtprop, vt_i4 );
//
// Obtain the manufacturer name
//
Pclsobj-> get (L "manufacturer", 0, & vtprop, 0, 0 );
}

Couninitialize ();