IWMSWMIBridgeAdmin::get_ExposedEventClasses
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IWMSWMIBridgeAdmin::get_ExposedEventClasses
The get_ExposedEventClasses method retrieves an enumeration value containing the event classes exposed by Windows Management Instrumentation.
Syntax
Parameters
pExposedEventClasses
[out] Pointer to the WMS_EVENT_CLASS enumeration value containing the event classes. This must be an exclusive OR of the following values.
| Value | Description |
| WMS_WMI_CLASS_UNKNOWN | Indicates an unknown event class. |
| WMS_WMI_CLASS_CLIENT | Indicates Windows Management Instrumentation (WMI) events for the client. |
| WMS_WMI_CLASS_SERVER | Indicates WMI events for the server. |
| WMS_WMI_CLASS_PUBLISHING_POINT | Indicates WMI events for the publishing point. |
| WMS_WMI_CLASS_LIMIT_CHANGE | Indicates WMI events for limit changes. |
| WMS_WMI_CLASS_LIMIT_HIT | Indicates WMI events for limit hits. |
| WMS_WMI_CLASS_PLUGIN | Indicates WMI events for plug-ins. |
| WMS_WMI_CLASS_CACHE | Indicates WMI events for a cache. |
| WMS_WMI_CLASS_PLAYLIST | Indicates WMI events for playlists. |
Return Values
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
| Return code | Number | Description |
| E_FAIL | c | The server cannot find the WMS WMI Event Handler plug-in. |
| E_INVALIDARG | 0x80070057 | The pExposedEventClasses parameter is NULL. |
| E_POINTER | 0x80004003 | The pExposedEventClasses parameter is NULL. |
Example Code
#include <windows.h>
#include <atlbase.h> // Includes CComVariant.
// To access system plug-in interfaces, the
// entire type library must be imported as shown.
#import "WMSServerTypeLib.dll" no_namespace named_guids \
raw_interfaces_only
// Declare variables and interfaces.
IWMSServer *pServer;
IWMSPlugins *pPlugins;
IWMSPlugin *pPlugin;
IDispatch *pDispatch;
IWMSWMIBridgeAdmin *pWMIBridgeAdmin;
HRESULT hr;
CComVariant varIndex;
// Initialize the COM library and retrieve a pointer
// to an IWMSServer interface.
hr = CoInitialize(NULL);
hr = CoCreateInstance(CLSID_WMSServer,
NULL,
CLSCTX_ALL,
IID_IWMSServer,
(void **)&pServer);
if (FAILED(hr)) goto EXIT;
// Retrieve a pointer to an IWMSPlugins interface
// containing event handler plug-ins.
hr = pServer->get_EventHandlers(&pPlugins);
if (FAILED(hr)) goto EXIT;
// Retrieve a pointer to the IWMSPlugin interface
// of the plug-in to be configured.
varIndex = "WMS WMI Event Handler";
hr = pPlugins->get_Item(varIndex, &pPlugin);
if (FAILED(hr)) goto EXIT;
// Retrieve a pointer to the custom interface
// of the plug-in.
hr = pPlugin->get_CustomInterface(&pDispatch);
if (FAILED(hr)) goto EXIT;
// Query the specific administration interface
// for the plug-in.
hr = pDispatch->QueryInterface(IID_IWMSWMIBridgeAdmin,
(void **)&pWMIBridgeAdmin);
if (FAILED(hr)) goto EXIT;
// Retrieve the event classes that are exposed by
// Windows Management Instrumentation.
WMS_EVENT_CLASS ecExposedEvents;
hr = pWMIBridgeAdmin->get_ExposedEventClasses(&ecExposedEvents);
if (FAILED(hr)) goto EXIT;
EXIT:
// TODO: Release temporary COM objects and uninitialize COM.
Requirements
Library: WMSServerTypeLib.dll.
Platform: Windows Server 2003 family, Windows Server 2008 family.
See Also
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