Асинхронное чтение данных из COM порта

#ifdef SetPort
    #undef SetPort
#endif
#include "BCPort.hpp"

//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner),
        FBComPort(new TBComPort(NULL))
{
 
}
//---------------------------------------------------------------------------
__fastcall TForm1::~TForm1()
{
    delete  FBComPort;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
    FBComPort->Port= L"COM5";
    FBComPort->Open();
    FBComPort->OnRxChar= &Recive;
}
//---------------------------------------------------------------------------
void __fastcall  TForm1::Recive(TObject* Sender, int Count)
{
// Что тут?
}
//---------------------------------------------------------------------------

FBComPort->Read(bufer,Count);

#include <string>
//---------------------------------------------------------------------------
void __fastcall  TForm1::Recive(TObject* Sender, int Count)
{
    RichEdit1->Lines->Add(Count);
 
    std::string buffer(256,'\0');
    int minCount= std::min<int>(Count,buffer.size());
    FBComPort->Read((void*)buffer.data(),minCount);
    buffer.resize(minCount);
 
    RichEdit1->Lines->Add(buffer.c_str());
 
//  String Content;
//  FBComPort->ReadStr(Content,Count);//Это не работает ибо String - 2байта/символ
//  RichEdit1->Lines->Add(Content);
}
//---------------------------------------------------------------------------