//引用DLL
        [DllImport("EUCPComm.dll", EntryPoint = "ReceiveSMSEx")]  // 接收短信
        public static extern int ReceiveSMSEx(string sn, deleSQF mySmsContent);
        
        //回调(接收短信)
        static void getSMSContent(string mobile, string senderaddi, string recvaddi, string ct, string sd, ref int flag)
        {
            string mob = mobile;
            string content = ct;
            int myflag = flag;
            //在此处将短信内容存入datatable
            DataRow RecRow = TempDT.NewRow();
            RecRow[0] = mobile;
            RecRow[1] = ct;
            RecRow[2] = sd;
            TempDT.Rows.Add(RecRow);
        }
        public delegate void deleSQF(string mobile, string senderaddi, string recvaddi, string ct, string sd, ref int flag);
        deleSQF mySmsContent = new deleSQF(getSMSContent);
        
        //声明静态的DataTable
        public static DataTable TempDT = new DataTable();
        
        //Form1_Load中初始化DataTable
        private void Form1_Load(object sender, EventArgs e)
        {
            TempDT.Columns.Add("mob");
            TempDT.Columns.Add("con");
            TempDT.Columns.Add("rtime");
        }
        
        //button5单击事件收取短信
        private void button5_Click(object sender, EventArgs e)
        {
            deleSQF mySmsContent = new deleSQF(getSMSContent);
            //接收短信                序列号       函数指针
            int result = 2;
            while (result == 2)  //当result = 2 时，说明还有下一批短信等待接收，这时需重新再调用一次ReceiveSMS方法
            {
                result = ReceiveSMSEx(textBox1.Text, mySmsContent);
                if (result == 1)
                {
                    textBox3.Text += "接收短信成功:"+DateTime.Now.ToString()+"\r\n";
                }
                else if (result == 101)
                {
                    textBox3.Text += "网络故障:" + DateTime.Now.ToString() + "\r\n";
                }
                else if (result == 102)
                {
                    textBox3.Text += "其它故障:" + DateTime.Now.ToString() + "\r\n";
                }
                else if (result == 105)
                {
                    textBox3.Text += "参数指针为空:" + DateTime.Now.ToString() + "'\r\n";
                }
                else if (result == 0)
                {
                    textBox3.Text += "失败:" + DateTime.Now.ToString() + "\r\n";
                }
                else if (result == -1)
                {
                    textBox3.Text += "未知故障:" + DateTime.Now.ToString() + "\r\n";
                }
            }
            //如果TempDT有记录
            if (TempDT.Rows.Count > 0)
            {
                foreach (DataRow row in TempDT.Rows)
                {
                    //显示短信号码、内容、时间。就这里出错，如果有2条未接受短信，点接收时，textBox3中显示接受到的两条记录是一样的
                    textBox3.Text += row[0].ToString() + "/" + row[1].ToString() + "/" + row[2].ToString() + "\r\n";
                }
                清空TempDT
                TempDT.Clear();
            }
        }