Detecting USB Stick Plug in and Plug out (USB Harddrive)

Re: Detecting USB Stick Plug in and Plug out (USB Harddrive)

Much better is to use the System.Manageme nt classes and register event
listeners for Win32_Diskdrive class operations.

Here's a small console sample.

// This code demonstrates how to monitor the UsbControllerDe vice for
// the arrival of creation/operation events
using System;
using System.Componen tModel;
using System.Runtime. InteropServices ;
using System.Manageme nt;
class WMIEvent {
public static void Main() {
WMIEvent we = new WMIEvent();
ManagementEvent Watcher w= null;
WqlEventQuery q;
ManagementOpera tionObserver observer = new ManagementOpera tionObserver();
// Bind to local machine
ManagementScope scope = new ManagementScope ("root\\CIMV2") ;
scope.Options.E nablePrivileges = true; //set required privilege
try {
q = new WqlEventQuery() ;
q.EventClassNam e = "__InstanceOper ationEvent";
q.WithinInterva l = new TimeSpan(0,0,3) ;
q.Condition = @"TargetInstanc e ISA 'Win32_DiskDriv e' ";
w = new ManagementEvent Watcher(scope, q);

w.EventArrived += new EventArrivedEve ntHandler(we.Di skEventArrived) ;
w.Start();
Console.ReadLin e(); // block main thread for test purposes
}
catch(Exception e) {
Console.WriteLi ne(e.Message);
}
finally {
w.Stop();
}
}
public void DiskEventArrive d(object sender, EventArrivedEve ntArgs e) {
//Get the Event object and display its properties (all)
foreach(Propert yData pd in e.NewEvent.Prop erties) {
ManagementBaseO bject mbo = null;
if(( mbo = pd.Value as ManagementBaseO bject) != null) {
Console.WriteLi ne("--------------Properties------------------");
foreach(Propert yData prop in mbo.Properties)
Console.WriteLi ne("{0} - {1}", prop.Name, prop.Value);
}
}
}

}


Willy.

"Daniel Diehl" <daniel@mediawo rker.net> wrote in message
news:33f45170.0 312132247.43f19 a42@posting.goo gle.com...[color=blue]
> Hi,
> I'm looking for a solution to detect if a USB Sticker (USB Drive) ist
> plugged in or plugged out. Currently Im able to detect Hardware Plugin
> and Plugout but don't get any information what type of device it is.
> Is there a way to get this information ?
> Currenty my solution work in that way (Also from this group):
>
> protected override void WndProc(ref Message m)
> {
> switch(m.Msg)
> {
> case Win32.WM_DEVICE CHANGE: OnDeviceChange( ref m); break;
> }
>
> base.WndProc (ref m);
> }
>
> void OnDeviceChange( ref Message msg)
> {
> int wParam = (int)msg.WParam ;
>
>
>
> if(wParam == Win32.DBT_DEVIC EARRIVAL)
> {
> statusBar.Text = "Hardware attached";
> frmLockScreen.C lose();
> }
> else if(wParam == Win32.DBT_DEVIC EREMOVECOMPLETE )
> {
> statusBar.Text = "Hardware entfernt";
>
> frmLockScreen.S how();
> }
> }
>
>
> void RegisterHidNoti fication()
> {
> Win32.DEV_BROAD CAST_DEVICEINTE RFACE dbi = new
> Win32.DEV_BROAD CAST_DEVICEINTE RFACE();
> int size = Marshal.SizeOf( dbi);
> dbi.dbcc_size = size;
> dbi.dbcc_device type = Win32.DBT_DEVTY P_DEVICEINTERFA CE;
> dbi.dbcc_reserv ed = 0;
> dbi.dbcc_classg uid = Win32.GUID_DEVI NTERFACE_HID;
> dbi.dbcc_name = 0;
> IntPtr buffer = Marshal.AllocHG lobal(size);
> Marshal.Structu reToPtr(dbi, buffer, true);
> IntPtr r = Win32.RegisterD eviceNotificati on(Handle, buffer,
> Win32.DEVICE_NO TIFY_WINDOW_HAN DLE);
> if(r == IntPtr.Zero)
> Console.WriteLi ne(Win32.GetLas tError().ToStri ng());
> }
>
> class Win32
> {
> public const int
> WM_DEVICECHANGE = 0x0219;
> public const int
> DBT_DEVICEARRIV AL = 0x8000,
> DBT_DEVICEREMOV ECOMPLETE = 0x8004;
> public const int
> DEVICE_NOTIFY_W INDOW_HANDLE = 0,
> DEVICE_NOTIFY_S ERVICE_HANDLE = 1;
> public const int
> DBT_DEVTYP_DEVI CEINTERFACE = 5;
> public static Guid
> GUID_DEVINTERFA CE_HID = new
> Guid("4D1E55B2-F16F-11CF-88CB-001111000030");
>
> [StructLayout(La youtKind.Sequen tial)]
> public class DEV_BROADCAST_D EVICEINTERFACE
> {
> public int dbcc_size;
> public int dbcc_devicetype ;
> public int dbcc_reserved;
> public Guid dbcc_classguid;
> public short dbcc_name;
> }
>
> [DllImport("user 32.dll", SetLastError=tr ue)]
> public static extern IntPtr RegisterDeviceN otification(
> IntPtr hRecipient,
> IntPtr NotificationFil ter,
> Int32 Flags);
>
> [DllImport("kern el32.dll")]
> public static extern int GetLastError();
> }
>
>
> Thanks for any hints,
> daniel[/color]