Thread: Help reading sms at commands

Reading and sending works fine on hyperterminal. What i want is to read sms and output it on a text box. I wrote this code, am I doing it right? I am not that experienced with c#. I think the correct method is use event handler but how to do it? Thanks..

Code:

 //read sms
        private void button3_Click(object sender, EventArgs e)
        {


            if (this.serialPort1.IsOpen)
            {

              serialPort1.BaseStream.Flush();

              string a = "sm"; string b = "all";
              //this.serialPort1.Write("AT+CPMS=\"" + a + "\"\r\n");
            // this.serialPort1.Write("AT+CPMS=SM\r\n");
 
                 // this.serialPort1.Write("AT+CMGF=1\r\n");
                 //this.serialPort1.Write("AT+CSCS=\"PCCP437\"");
                 //this.serialPort1.Write("AT+CPMS=\"" + a + "\"\r\n");
                 this.serialPort1.Write("AT+CMGR=2\r");
        


              //this.serialPort1.Write("AT+CMGL=\"" + b + "\"\r\n");


           textBox5.Text = this.serialPort1.ReadExisting();


              
          MessageBox.Show("\nMessage Was Read\n", "Information");
               

            }

           else
           {
                MessageBox.Show("\nSerial Port Is Not Open\n", " ERROR ");
           }



        }