WINCE 获取智能设备唯一编号

using System;

using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using System.Runtime.InteropServices;//提供了一个方法集，这些方法用于分配非托管内存、复制非托管内存块、将托管类型转换为非托管类型，此外还提供了在与非托管代码交互时使用的其他杂项方法
namespace LogisticsManage
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [DllImport("coredll.dll")]
        private extern static int GetDeviceUniqueID([In, Out] byte[] appdata,
                                                    int cbApplictionData,
                                                    int dwDeviceIDVersion,
                                                    [In, Out] byte[] deviceIDOuput,
                                                    out uint pcbDeviceIDOutput);

        private void button1_Click(object sender, EventArgs e)
        {
            byte[] buffer = GetDeviceID("MyAppString");
            StringBuilder sb = new StringBuilder();
            for (int x = ; x < buffer.Length; x++)
            {
                //sb.Append('{');
                sb.Append(string.Format("{0:x2}", buffer[x]));
                //sb.Append("} ");
            }
            textBox1.Text = sb.ToString();
        }

        private byte[] GetDeviceID(string AppString)
        {
            // Call the GetDeviceUniqueID
            byte[] AppData = new byte[AppString.Length];
            for (int count = ; count < AppString.Length; count++)
                AppData[count] = (byte)AppString[count];
            int appDataSize = AppData.Length;
            byte[] DeviceOutput = new byte[];
            uint SizeOut = ;
            GetDeviceUniqueID(AppData, appDataSize, , DeviceOutput, out SizeOut);
            return DeviceOutput;
        }
    }
}