Much better is to use the System.Management classes and register event
listeners for Win32_Diskdrive class operations.
Here's a small console sample.
// This code demonstrates how to monitor the UsbControllerDevice for
// the arrival of creation/operation events
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Management;
class WMIEvent {
public static void Main() {
WMIEvent we = new WMIEvent();
ManagementEventWatcher w= null;
WqlEventQuery q;
ManagementOperationObserver observer = new ManagementOperationObserver();
// Bind to local machine
ManagementScope scope = new ManagementScope("root\\CIMV2");
scope.Options.EnablePrivileges = true; //set required privilege
try {
q = new WqlEventQuery();
q.EventClassName = "__InstanceOperationEvent";
q.WithinInterval = new TimeSpan(0,0,3);
q.Condition = @"TargetInstance ISA 'Win32_DiskDrive' ";
w = new ManagementEventWatcher(scope, q);
w.EventArrived += new EventArrivedEventHandler(we.DiskEventArrived);
w.Start();
Console.ReadLine(); // block main thread for test purposes
}
catch(Exception e) {
Console.WriteLine(e.Message);
}
finally {
w.Stop();
}
}
public void DiskEventArrived(object sender, EventArrivedEventArgs e) {
//Get the Event object and display its properties (all)
foreach(PropertyData pd in e.NewEvent.Properties) {
ManagementBaseObject mbo = null;
if(( mbo = pd.Value as ManagementBaseObject) != null) {
Console.WriteLine("--------------Properties------------------");
foreach(PropertyData prop in mbo.Properties)
Console.WriteLine("{0} - {1}", prop.Name, prop.Value);
}
}
}
}
Willy.
"Daniel Diehl" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> 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_DEVICECHANGE: OnDeviceChange(ref m); break;
> }
>
> base.WndProc (ref m);
> }
>
> void OnDeviceChange(ref Message msg)
> {
> int wParam = (int)msg.WParam;
>
>
>
> if(wParam == Win32.DBT_DEVICEARRIVAL)
> {
> statusBar.Text = "Hardware attached";
> frmLockScreen.Close();
> }
> else if(wParam == Win32.DBT_DEVICEREMOVECOMPLETE)
> {
> statusBar.Text = "Hardware entfernt";
>
> frmLockScreen.Show();
> }
> }
>
>
> void RegisterHidNotification()
> {
> Win32.DEV_BROADCAST_DEVICEINTERFACE dbi = new
> Win32.DEV_BROADCAST_DEVICEINTERFACE();
> int size = Marshal.SizeOf(dbi);
> dbi.dbcc_size = size;
> dbi.dbcc_devicetype = Win32.DBT_DEVTYP_DEVICEINTERFACE;
> dbi.dbcc_reserved = 0;
> dbi.dbcc_classguid = Win32.GUID_DEVINTERFACE_HID;
> dbi.dbcc_name = 0;
> IntPtr buffer = Marshal.AllocHGlobal(size);
> Marshal.StructureToPtr(dbi, buffer, true);
> IntPtr r = Win32.RegisterDeviceNotification(Handle, buffer,
> Win32.DEVICE_NOTIFY_WINDOW_HANDLE);
> if(r == IntPtr.Zero)
> Console.WriteLine(Win32.GetLastError().ToString());
> }
>
> class Win32
> {
> public const int
> WM_DEVICECHANGE = 0x0219;
> public const int
> DBT_DEVICEARRIVAL = 0x8000,
> DBT_DEVICEREMOVECOMPLETE = 0x8004;
> public const int
> DEVICE_NOTIFY_WINDOW_HANDLE = 0,
> DEVICE_NOTIFY_SERVICE_HANDLE = 1;
> public const int
> DBT_DEVTYP_DEVICEINTERFACE = 5;
> public static Guid
> GUID_DEVINTERFACE_HID = new
> Guid("4D1E55B2-F16F-11CF-88CB-001111000030");
>
> [StructLayout(LayoutKind.Sequential)]
> public class DEV_BROADCAST_DEVICEINTERFACE
> {
> public int dbcc_size;
> public int dbcc_devicetype;
> public int dbcc_reserved;
> public Guid dbcc_classguid;
> public short dbcc_name;
> }
>
> [DllImport("user32.dll", SetLastError=true)]
> public static extern IntPtr RegisterDeviceNotification(
> IntPtr hRecipient,
> IntPtr NotificationFilter,
> Int32 Flags);
>
> [DllImport("kernel32.dll")]
> public static extern int GetLastError();
> }
>
>
> Thanks for any hints,
> daniel
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