c# wince 取设备号

wince设备，有时为了做软件保护，采取注册限制，需要取设备的序列号，以下为通用的取法，网上抄的。

using   System; using   System.Collections.Generic; using   System.ComponentModel; using   System.Data; using   System.Drawing; using   System.Text; using   System.Windows.Forms; using   System.Collections; using   System.Diagnostics; using   System.Runtime.InteropServices; using   System.IO; using   System.Security.Cryptography;namespace Check{    class LiangDeviceID    {        private static string[] strEncrypt = new string[] { "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "AA", "AB", "AC", "AD", "AE", "AF", "AG", "AH", "AI", "AJ", "AK", "AL", "AM", "AN", "AO", "AP" };        private   static   Int32   METHOD_BUFFERED   =   0;         private   static   Int32   FILE_ANY_ACCESS   =   0;         private   static   Int32   FILE_DEVICE_HAL   =   0x00000101;         private   const   Int32   ERROR_NOT_SUPPORTED   =   0x32;         private   const   Int32   ERROR_INSUFFICIENT_BUFFER   =   0x7A;         private   static   Int32   IOCTL_HAL_GET_DEVICEID   =   ((FILE_DEVICE_HAL)   <<   16)   |   ((FILE_ANY_ACCESS)   <<   14)   |   ((21)   <<   2)   |   (METHOD_BUFFERED);         [DllImport( "coredll.dll",   SetLastError   =   true)]         private   static   extern   bool   KernelIoControl(Int32   dwIoControlCode,   IntPtr   lpInBuf,   Int32   nInBufSize,   byte[]   lpOutBuf,   Int32   nOutBufSize,   ref   Int32   lpBytesReturned);         public   static   string   GetDeviceID()         {             try            {                //   Initialize   the   output   buffer   to   the   size   of   a   Win32   DEVICE_ID   structure                 byte[] outbuff = new byte[20];                Int32 dwOutBytes;                bool done = false;                Int32 nBuffSize = outbuff.Length;                //   Set   DEVICEID.dwSize   to   size   of   buffer.     Some   platforms   look   at                 //   this   field   rather   than   the   nOutBufSize   param   of   KernelIoControl                 //   when   determining   if   the   buffer   is   large   enough.                 //                 BitConverter.GetBytes(nBuffSize).CopyTo(outbuff, 0);                dwOutBytes = 0;                //   Loop   until   the   device   ID   is   retrieved   or   an   error   occurs                 while (!done)                {                    if (KernelIoControl(IOCTL_HAL_GET_DEVICEID, IntPtr.Zero, 0, outbuff, nBuffSize, ref   dwOutBytes))                    {                        done = true;                    }                    else                    {                        int error = Marshal.GetLastWin32Error();                        switch (error)                        {                            case ERROR_NOT_SUPPORTED:                                throw new NotSupportedException("IOCTL_HAL_GET_DEVICEID   is   not   supported   on   this   device ", new Win32Exception(error));                            case ERROR_INSUFFICIENT_BUFFER:                                //   The   buffer   wasn 't   big   enough   for   the   data.     The                                 //   required   size   is   in   the   first   4   bytes   of   the   output                                 //   buffer   (DEVICE_ID.dwSize).                                 nBuffSize = BitConverter.ToInt32(outbuff, 0);                                outbuff = new byte[nBuffSize];                                //   Set   DEVICEID.dwSize   to   size   of   buffer.     Some                                 //   platforms   look   at   this   field   rather   than   the                                 //   nOutBufSize   param   of   KernelIoControl   when                                 //   determining   if   the   buffer   is   large   enough.                                 //                                 BitConverter.GetBytes(nBuffSize).CopyTo(outbuff, 0);                                break;                            default:                                throw new Win32Exception(error, "Unexpected   error ");                        }                    }                }                Int32 dwPresetIDOffset = BitConverter.ToInt32(outbuff, 0x4);         //   DEVICE_ID.dwPresetIDOffset                 Int32 dwPresetIDSize = BitConverter.ToInt32(outbuff, 0x8);             //   DEVICE_ID.dwPresetSize                 Int32 dwPlatformIDOffset = BitConverter.ToInt32(outbuff, 0xc);     //   DEVICE_ID.dwPlatformIDOffset                 Int32 dwPlatformIDSize = BitConverter.ToInt32(outbuff, 0x10);       //   DEVICE_ID.dwPlatformIDBytes                 StringBuilder sb = new StringBuilder();                for (int i = dwPresetIDOffset; i < dwPresetIDOffset + dwPresetIDSize; i++)                {                    //sb.Append(String.Format( "{0:X2} ",   outbuff[i]));                    sb.Append(String.Format("{0} ", outbuff[i]));                }                //sb.Append("- ");                //for (int i = dwPlatformIDOffset; i < dwPlatformIDOffset + dwPlatformIDSize; i++)                //{                //    //sb.Append(String.Format( "{0:X2} ",   outbuff[i]));                //    sb.Append(String.Format("{0} ", outbuff[i]));                //}                return sb.ToString();             }            catch (System.Exception e)            {                MessageBox.Show("取设备序列号异常"+e.Message );                StringBuilder sb = new StringBuilder();                sb.Append("austec 010-59713137");                return sb.ToString();            }        }         public static string GetEncrypt( string strDeviceID )        {            int i, no;                        StringBuilder   sb   =   new   StringBuilder();            for (i = 0; i < strDeviceID.Length; i++)            {                try                {                    no = int.Parse(strDeviceID[i].ToString());                }                catch (System.Exception ex)                {                    no =1;                }                               if (no > strEncrypt.Length)                    no = no%strEncrypt.Length;                sb.Append(String.Format( "{0}", strEncrypt[no]) );            }            return sb.ToString();        }    }}