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UnitComm.h：源码内容

							//---------------------------------------------------------------------------
#ifndef UnitCommH
#define UnitCommH
#define BLOCK_LENGTH 1024
#include "UnitMain.h"
class TCommunication:public TObject
{
public:
    HANDLE hCom;
    __fastcall TCommunication();
    virtual __fastcall ~TCommunication();
    bool __fastcall ComInitialization(AnsiString DevicePort,
        int BaudRate,int ByteSize, int Parity, int StopBits);
    char * __fastcall ReceiveProcess();
    BOOL  __fastcall WriteCommBlock(LPSTR lpBlock,DWORD nMaxLength);
private:
    //接收缓冲区
    char Buffer[BLOCK_LENGTH+1];
    //接收缓冲区计数器，加1计数器
    DWORD BufferOffset;
    //分别为读、写重叠数据结构
    OVERLAPPED osRead,osWrite;
    DWORD  __fastcall ReadCommBlock(LPSTR lpBlock,DWORD nMaxLength);
};
//---------------------------------------------------------------------------
#endif

						