HwndSource source = PresentationSource.FromVisual(this) as HwndSource;

void Main()

{

    var window = new Window

    {

        Width = 0,

        Height = 0,

        WindowStyle = WindowStyle.None,

        ShowInTaskbar = false,

        ShowActivated = false

    };

    window.Loaded += a_Loaded;

    window.Show();

}

void a_Loaded(object sender, EventArgs e)

{

    var s = (Window) sender;

    var source = PresentationSource.FromVisual(s);

     if (hwndSource != null)

                {

                    hwndSource.AddHook(newHwndSourceHook(USBDeviceChanged));

                }

    //...

    s.Close();

}

/// <summary>
/// 设备变更
/// </summary>

WM_DEVICECHANGE = 0x219,

/// <summary>
/// 设备树节点变更（新增或删除了设备）
/// </summary>
DBT_DEVNODES_CHANGED = 0x0007,

private IntPtr USBDeviceChanged(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handle)
{
　　if (msg == WindowsMessage.WM_DEVICECHANGE.GetHashCode())
　　{

　　　　if (wParam.ToInt32() == WindowsMessage.DBT_DEVNODES_CHANGED.GetHashCode())

　　　　 DeviceUpdate();

　　}

　　return IntPtr.Zero;

}