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POWMI and Win32_DeviceChangeEvent - Wrong event type returned?
 

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    <p>I am trying to register to a "Device added/ Device removed" event using WMI. When I say device - I mean something in the lines of a Disk-On-Key or any other device that has files on it which I can access...</p> <p>I am registering to the event, and the event is raised, but the EventType propery is different from the one I am expecting to see.</p> <p>The documentation (<a href="http://msdn.microsoft.com/en-us/library/aa394124(VS.85).aspx" rel="nofollow noreferrer">MSDN</a>) states : 1- config change, 2- Device added, 3-Device removed 4- Docking. For some reason I always get a value of 1. </p> <p>Any ideas ?</p> <p>Here's sample code : </p> <pre><code>public class WMIReceiveEvent { public WMIReceiveEvent() { try { WqlEventQuery query = new WqlEventQuery( "SELECT * FROM Win32_DeviceChangeEvent"); ManagementEventWatcher watcher = new ManagementEventWatcher(query); Console.WriteLine("Waiting for an event..."); watcher.EventArrived += new EventArrivedEventHandler( HandleEvent); // Start listening for events watcher.Start(); // Do something while waiting for events System.Threading.Thread.Sleep(10000); // Stop listening for events watcher.Stop(); return; } catch(ManagementException err) { MessageBox.Show("An error occurred while trying to receive an event: " + err.Message); } } private void HandleEvent(object sender, EventArrivedEventArgs e) { Console.WriteLine(e.NewEvent.GetPropertyValue["EventType"]); } public static void Main() { WMIReceiveEvent receiveEvent = new WMIReceiveEvent(); return; } } </code></pre>
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