using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Security;

namespace SuperMap.RealEstate.SecurityDevice
{
    #region SecurityDeviceHelper
    [SecuritySafeCritical]
    internal class SecurityDeviceHelper
    {
        //public static ISecurityDevice CreateSecurityDevice()
        //{
        //    //换设备时候，操作如下
        //    //1、修改UsbKeyDevice为新设备类库
        //    //2、引用相关类库。本范例引用 Components.UsbKey.dll

        //    return new UsbKeyDevice();
        //}

        public const int WM_DEVICECHANGE = 0x0219;
        public const int DBT_DEVICEARRIVAL = 0x8000; // systemdetected a new device
        public const int DBT_DEVICEREMOVECOMPLETE = 0x8004; // device is gone
        public const int DEVICE_NOTIFY_WINDOW_HANDLE = 0;
        public const int DEVICE_NOTIFY_SERVICE_HANDLE = 1;
        public const int DBT_DEVTYP_DEVICEINTERFACE = 0x00000005; // deviceinterface class
        public static Guid GUID_DEVINTERFACE_USB_DEVICE = new Guid("4D1E55B2-F16F-11CF-88CB-001111000030");


        //[StructLayout(LayoutKind.Sequential)]
        //public class DEV_BROADCAST_HDR
        //{
        //    public int dbcc_size;
        //    public int dbcc_devicetype;
        //    public int dbcc_reserved;
        //}

        [StructLayout(LayoutKind.Sequential)]
        public struct DEV_BROADCAST_DEVICEINTERFACE
        {
            public int dbcc_size;
            public int dbcc_devicetype;
            public int dbcc_reserved;
            public Guid dbcc_classguid;
            public short dbcc_name;
        }

        //[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        //public class DEV_BROADCAST_DEVICEINTERFACE1
        //{
        //    public int dbcc_size;
        //    public int dbcc_devicetype;
        //    public int dbcc_reserved;
        //    [MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.U1, SizeConst = 16)]
        //    public byte[] dbcc_classguid;
        //    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)]
        //    public char[] 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();

    }
    #endregion
}