"Paul Taylor" wrote:

> Hi there,
>
> I'm trying to write something in VB.NET that registers the insertion of a
> USB device (specifically a USB flash drive) and acts upon the event.  I've
> done some reading up and it seems that using ManagementEventWatchers is the
> way to go, yet using the code below in a test project, I find that inserting
> a USB drive triggers up to about 5 events instead of just the 1 I'm
> expecting.
>
> If anyone could point out the error of my ways that'd be great.
>
> Cheers
>
> Paul Taylor
>
>
> Imports System.management
> Public Class Form1
> Inherits System.Windows.Forms.Form
> ...
> Dim query As WqlEventQuery
> Dim WithEvents watch As ManagementEventWatcher
> Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles MyBase.Load
> query = New WqlEventQuery("Select * from Win32_DeviceChangeEvent")
> watch = New ManagementEventWatcher(query)
> watch.Start()
> End Sub
>
> Private Sub w_EventArrived(ByVal sender As Object, ByVal e As
> System.Management.EventArrivedEventArgs) Handles watch.EventArrived
> MsgBox("Event!")
> End Sub
> End Class
>
>
>