mComPort->Port = "COM1";
이 문장이 안 먹혀서 물어 보는건데...
이렇게 하면 다들 잘 되나요?

일단, 다시 확인해 보겠습니다.
랩탑이라 COM1이 없어서 그런가...

조대현.Clau 님이 쓰신 글 :
: 1. ComPort에 Port라는 속성(AnsiString)이 있습니다.
: "COM1" "COM11" 이런식으로 지정하시는 겁니다.
:
: 아래는 Port와 baud등 통신설정을 하는 예제입니다.
:
: br110, dbFive등의 선언은 CPort.Hpp에 나와있습니다.
:
:         TComPort *mComPort;
:
:         mComPort = Sender;
:         mComPort->Port = "COM1";
:
:         // Baud Rate
:         switch(EquipPort.BaudRate){
:             case 110:        mComPort->BaudRate = br110; break;
:             case 300:        mComPort->BaudRate = br300; break;
:             case 600:        mComPort->BaudRate = br600; break;
:             case 1200:        mComPort->BaudRate = br1200; break;
:             case 2400:        mComPort->BaudRate = br2400; break;
:             case 4800:        mComPort->BaudRate = br4800; break;
:             case 9600:        mComPort->BaudRate = br9600; break;
:             case 14400:        mComPort->BaudRate = br14400; break;
:             case 19200:        mComPort->BaudRate = br19200; break;
:             case 38400:        mComPort->BaudRate = br38400; break;
:             case 56000:        mComPort->BaudRate = br56000; break;
:             case 57600:        mComPort->BaudRate = br57600; break;
:             case 115200:    mComPort->BaudRate = br115200; break;
:             case 128000:    mComPort->BaudRate = br128000; break;
:             case 256000:    mComPort->BaudRate = br256000; break;
:             default:        mComPort->BaudRate = br9600; break;
:         }
:         // Data Bits
:         switch(EquipPort.DataBits){
:             case 5:            mComPort->DataBits = dbFive; break;
:             case 6:            mComPort->DataBits = dbSix; break;
:             case 7:            mComPort->DataBits = dbSeven; break;
:             case 8:            mComPort->DataBits = dbEight; break;
:             default:        mComPort->DataBits = dbEight; break;
:         }
:         // Stop Bits
:         switch(EquipPort.StopBits){
:             case 1:            mComPort->StopBits = sbOneStopBit; break;
:             case 2:            mComPort->StopBits = sbTwoStopBits; break;
:             default:          mComPort->StopBits = sbTwoStopBits; break;
:         }
:         // Parity
:         switch(EquipPort.Parity){
:             case 'N':        mComPort->Parity->Bits = prNone  ; break;
:             case 'O':        mComPort->Parity->Bits = prOdd; break;
:             case 'E':        mComPort->Parity->Bits = prEven; break;
:             case 'M':        mComPort->Parity->Bits = prMark; break;
:             case 'S':        mComPort->Parity->Bits = prSpace; break;
:             default:         mComPort->Parity->Bits = prEven; break;
:         }