c++ serial data read

how to read data from serial port on visual c++ ? i can send out but how to read?
i nead to read data in textBox…

this ir the way how i send out

this->serialPort1->PortName = “COM3”;
this->serialPort1->Open();
this->serialPort1->Write( “1” );
this->serialPort1->Close();

Find the declaration for serialPort1. Highlight SerailPort. Press F1. Read all about the SerialPort class members, including Read, ReadLine, and ReadTo. Pick the one that makes the most sense for your application, and write some code to use that method. I’m sure you can figure out how to put the text in a text box, then.