RÉCUPÉRER LES CODES IMEI, IMSI, OEM [MANAGED TAPI]

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using OpenNETCF.Tapi;
// Référence a ajouter : Biblio TapiLib.dll
namespace Tapi_IMEI_EMSI_OEM
{
    public partial class frmMain : Form
    {
        // fonctions des dll PINVOKE.
        [DllImport("cellcore.dll")] 
        internal static extern int lineGetGeneralInfo(IntPtr hLine, byte[] bCache);
        //OEM:pour Original Equipment Manufacturer
        //IMSI:pour International Mobile Subscriber Identity 
        //IMEI:pour International Mobile Equipment Identity
        internal struct GeneralInfos
        {
            internal string OEM;
            internal string Model;
            internal string Revision;
            internal string IMEI;
            internal string IMSI;
        }
        public frmMain()
        { 
            InitializeComponent(); 
        }

        static public String GetDisplayHorzRes()
        { 
            return Screen.PrimaryScreen.Bounds.Width.ToString(); 
        }
        static public String GetDisplayVertRes()
        { 
            return Screen.PrimaryScreen.Bounds.Height.ToString(); 
        }


        internal static GeneralInfos GetGeneralInfos()
        {
            //Creation d'un objet Tapi
            Tapi t = new Tapi();
            t.Initialize();
            //Objet line
            Line l = t.CreateLine(0, LINEMEDIAMODE.INTERACTIVEVOICE, LINECALLPRIVILEGE.MONITOR);
            //Reservation d'un espace mémoire pour la lecture des infos.
            byte[] buffer = new byte[512];
            BitConverter.GetBytes(512).CopyTo(buffer, 0);
            // Lecture des infos, vérification du resultat de l'opération.
            if (lineGetGeneralInfo(l.hLine, buffer) != 0)
            {
                throw new System.ComponentModel.Win32Exception(System.Runtime.InteropServices.Marshal.GetLastWin32Error(), "TAPI Error: " + System.Runtime.InteropServices.Marshal.GetLastWin32Error().ToString("X"));
            }
            // preparations pour l'extraction des informations.
            GeneralInfos gi = new GeneralInfos();

            // OEM.
            int manuSize = BitConverter.ToInt32(buffer, 12);
            int manuOffset = BitConverter.ToInt32(buffer, 16);
            gi.OEM = System.Text.Encoding.Unicode.GetString(buffer, manuOffset, manuSize);
            gi.OEM = gi.OEM.Substring(0, gi.OEM.IndexOf(Convert.ToChar(0)));
            
            // Model        
            int modelSize = BitConverter.ToInt32(buffer, 20);
            int modelOffset = BitConverter.ToInt32(buffer, 24);
            gi.Model = System.Text.Encoding.Unicode.GetString(buffer, modelOffset, modelSize);
            gi.Model = gi.Model.Substring(0, gi.Model.IndexOf(Convert.ToChar(0)));
            
            //Révision
            int revSize = BitConverter.ToInt32(buffer, 28);
            int revOffset = BitConverter.ToInt32(buffer, 32);
            gi.Revision = System.Text.Encoding.Unicode.GetString(buffer, revOffset, revSize);
            gi.Revision = gi.Revision.Substring(0, gi.Revision.IndexOf(Convert.ToChar(0)));

            //IMEI
            int IMEI = BitConverter.ToInt32(buffer, 36);
            int IMEIoffset = BitConverter.ToInt32(buffer, 40);
            gi.IMEI = System.Text.Encoding.Unicode.GetString(buffer, IMEIoffset, IMEI);
            gi.IMEI = gi.IMEI.Substring(0, gi.IMEI.IndexOf(Convert.ToChar(0)));

            //IMSI
            int IMSIsize = BitConverter.ToInt32(buffer, 44);
            int IMSIoffset = BitConverter.ToInt32(buffer, 48);
            gi.IMSI = System.Text.Encoding.Unicode.GetString(buffer, IMSIoffset, IMSIsize);
            gi.IMSI = gi.IMSI.Substring(0, gi.IMSI.IndexOf(Convert.ToChar(0)));
            
            l.Dispose();
            t.Shutdown();
            return gi;
        }
        private void frmMain_Load(object sender, EventArgs e)
        {
            GeneralInfos gi = GetGeneralInfos();

            lblHorizRes.Text +=  GetDisplayHorzRes();
            lblVertRes.Text += GetDisplayVertRes();
            lblIMEICode.Text += gi.IMEI;
            lblIMSICode.Text += gi.IMSI;
            lblOEM.Text += gi.OEM;
            lblModel.Text += gi.Model;
            lblRevision.Text += gi.Revision;
        }

        private void mnuQuit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
    }
}