Figure 1 WMI Management Information in Windows 2000
| Core Win32 information |
Process, service, computer system, operating system, logical disk, environment variables, network adapters, and more than 200 other objects |
| Microsoft Windows Installer |
Installed software information |
| Windows NT Event Log |
Receive Windows NT events, backup event logs |
| Performance Monitor |
Access to Windows NT performance data |
| Registry |
System registry information |
| Windows Driver Model (WDM) |
Access for any WMI-enabled WDM device drivers (see https://www.microsoft.com/ddk) |
| Simple Network Management Protocol (SNMP) |
Access to data and traps from any conformant SNMP device |
Figure 4 SWbemServices
| Methods |
Description |
| AssociatorsOf |
Returns an SWbemObjectSet collection of classes or instances that are associated with a specified object |
| ConnectServer |
Connects to a WMI namespace, returning an SWbemServices object |
| Delete |
Deletes an object |
| ExecMethod |
Executes a method on a class or instance |
| ExecNotificationQuery |
Executes a query to receive events |
| ExecQuery |
Executes a query to retrieve an SWbemObjectSet collection |
| Get |
Retrieves a single SWbemObject (class or instance) |
| InstancesOf |
Returns an SWbemObjectSet containing the instances of a specified class |
| ReferencesTo |
Returns an SWbemObjectSet collection of classes or instances that reference a specified object |
| SubclassesOf |
Returns an SWbemObjectSet containing the subclasses of a specified class |
| Properties |
Description |
| Security_ |
SWbemSecurity object that defines security attributes of this object |
Figure 5 SWbemObject
| Methods |
Description |
| Associators_ |
Returns an SWbemObjectSet collection of classes or instances that are associated with this object |
| Clone_ |
Clones a copy of this object |
| CompareTo_ |
Compares this object to another object |
| Delete_ |
Deletes this object |
| ExecMethod_ |
Executes a method on this object |
| GetObjectText_ |
Returns a textual representation of this object |
| Instances_ |
Returns an SWbemObjectSet containing the instances of this object (which must be a CIM class) |
| Put_ |
Saves this object to CIMOM |
| References_ |
Returns an SWbemObjectSet collection of classes or instances that reference this object |
| SpawnDerivedClass_ |
Returns an SWbemObject representing an empty subclass of this object (which must be a CIM class) |
| SpawnInstance_ |
Returns an SWbemObject representing an empty instance of this object (which must be a CIM class) |
| Subclasses_ |
Returns an SWbemObjectSet containing the subclasses of this object (which must be a CIM class) |
| Properties |
Description |
| Derivation_ |
An array of strings describing the derivation hierarchy for the class |
| Methods_ |
An SWbemMethodSet object that is the collection of CIM methods for this object |
| Path_ |
An SWbemObjectPath object that is the object path of this object |
| Properties_ |
An SWbemPropertySet object that is the collection of CIM properties for this object |
| Qualifiers_ |
An SWbemQualifierSet object that is the collection of CIM qualifiers for this object |
| Security_ |
SWbemSecurity object that defines security attributes of this object |
Figure 6 SWbemSink
| Methods |
Description |
| Cancel |
Cancels all currently outstanding asynchronous calls made using this Sink |
| Events |
Description |
| OnCompleted |
Called when an asynchronous operation is complete |
| OnObjectPut |
Called after an SWbemObject.PutAsync_ operation |
| OnObjectReady |
Called when an object provided by an asynchronous call is available |
| OnProgress |
Called to provide the status of an asynchronous operation |
Figure 7 Using WMI with Dynamic HTML
<HTML><HEAD>
<SCRIPT FOR="mysink" EVENT="OnCompleted(hResult, pErrorObject, pAsyncContext)" LANGUAGE="VBScript">
alert("Completed")
</SCRIPT>
<SCRIPT FOR="mysink" EVENT="OnObjectReady(objObject, objAsyncContext)" LANGUAGE="VBScript">
document.all.info.innerText = objObject.DisplayName
</SCRIPT>
<SCRIPT LANGUAGE="VBScript">
<!--
Sub Document_OnClick
Set Service = Locator.ConnectServer()
Service.GetAsync mysink,"Win32_Service.Name='Winmgmt'"
end sub
-->
</SCRIPT>
</HEAD>
<BODY>
The name of the service is <SPAN ID="info"> unknown</SPAN>.
<OBJECT ID="Locator"
CLASSID="CLSID:76A64158-CB41-11D1-8B02-00600806D9B6"></OBJECT>
<OBJECT ID="mysink"
CLASSID="CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223"></OBJECT>
</BODY>
</HTML>