System::IO::Ports in VC++ windows forms

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C++

WinForms

serial-port

Hi all

I face a problem to sending/receiving data from serial port.

I have a string "Hello World".

I use

//at sending part
array<byte>^ sbyte = Encoding::ASCII -> GetBytes("€‚ƒ‰Š");
this -> serialPort1 -> Write(sbyte, 0, sbyte -> Length);

//receiving part
String^ cipher = this -> serialPort1 -> ReadLine;
array<byte>^ rbyte = this -> serialPort1 -> Read(cipher, 0, cipher -> Length);

From above code, i cant receive any byte.

the main thing i would like to do is
1) Get Byte from a String which contain extended ASCII.
2) send in byte form
3) receive in byte form

I discovered if i straight send extended ASCII in string form, the receiver can't determine it and come out "?????".
Got any other way to make sure the extended ASCII can send and receive properly?

Thanks in advance who can help me...