Windows Management Instrumentation (WMI)

Asynchronous Event Notification

The mechanism for event delivery described earlier provides a simple, convenient facility for interacting with WMI events from VBScript. Despite its convenience, however, it has one serious limitation: At any given time, a script using this mechanism can respond only to events emanating from a single SWbemEventSource object. In practice, this imposes two irritating restrictions. First, a single script cannot respond to different types of event simultaneously unless they can all be specified in a single query. Second, a single script can receive events from only one machine at a time. One of the most exciting promises of WMI Event Notification is its capability to constantly monitor the state of machines across ...