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  [Linker Error] Unresolved external 'TYbCommDevice::' referenced from E:\LOCKDLL\MAIN.OBJ
  [Linker Error] Unresolved external '__fastcall TYbCommDevice::TYbCommDevice(Classes::TComponent *)' referenced from E:\LOCKDLL\MAIN.OBJ
  [Linker Error] Unresolved external '__fastcall TYbCustomCommDevice::fSetPort(int)' referenced from E:\LOCKDLL\MAIN.OBJ
  [Linker Error] Unresolved external '__fastcall TYbCustomCommDevice::fSetBaud(TYbCustomCommDevice::TBaudRate)' referenced from E:\LOCKDLL\MAIN.OBJ
  [Linker Error] Unresolved external '__fastcall TYbCustomCommDevice::fSetParity(TYbCustomCommDevice::TParity)' referenced from E:\LOCKDLL\MAIN.OBJ
  [Linker Error] Unresolved external '__fastcall TYbCustomCommDevice::fSetByteSize(int)' referenced from E:\LOCKDLL\MAIN.OBJ
  [Linker Error] Unresolved external '__fastcall TYbCustomCommDevice::fSetStopBits(TYbCustomCommDevice::TStopBits)' referenced from E:\LOCKDLL\MAIN.OBJ
  [Linker Error] Unresolved external '__fastcall TYbCustomCommDevice::fSetActive(bool)' referenced from E:\LOCKDLL\MAIN.OBJ
  [Linker Error] Unresolved external '__fastcall TYbCustomCommDevice::fGetActive()' referenced from E:\LOCKDLL\MAIN.OBJ
//＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
不取消此选项时编译正常！

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////////////////////////
// Unit2.h 文件的内容 //
////////////////////////


//---------------------------------------------------------------------------
#ifndef Unit2H
#define Unit2H
//---------------------------------------------------------------------------
#include
//---------------------------------------------------------------------------
#ifdef __cplusplus
extern "C" { //DLL 导出的接口函数从这里开始
#endif
//---------------------------------------------------------------------------
extern int __export WINAPI OpenComm(int iPortNo);
extern void __export WINAPI CloseComm(void);
//在此处添加其他 DLL 导出的函数
//---------------------------------------------------------------------------
#ifdef __cplusplus
} //extern "C" //DLL 导出的接口函数到这里结束
#endif
//---------------------------------------------------------------------------
#endif
//---------------------------------------------------------------------------


//////////////////////////
// Unit2.cpp 文件的内容 //
//////////////////////////


//---------------------------------------------------------------------------
#pragma hdrstop
#include "Unit2.h"
#include "YbCommDevice.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
//---------------------------------------------------------------------------
class TMyDllEntry
{
public:
  TMyDllEntry();
  ~TMyDllEntry();

  int OpenComm(int iPortNo);
  void CloseComm(void);

  //在此处添加其他公用函数

  __property TYbCommDevice *Comm = {read=_Comm}; //通过这个属性可以安全的访问_Comm私有成员变量

private:
  TYbCommDevice *_Comm;
  void __fastcall CommPackage(TObject *Sender, int NotifyType);

  //在此处添加私有函数
};
//---------------------------------------------------------------------------
TMyDllEntry::TMyDllEntry()
{
  _Comm = new TYbCommDevice(NULL); //分配内存 (DLL 文件装载时自动运行)
  _Comm->OnPackage = CommPackage; //OnPackage 事件: CommPackage 成员函数
}
//---------------------------------------------------------------------------
TMyDllEntry::~TMyDllEntry()
{
  _Comm->Active = false; //如果程序结束运行时未关闭串口，在这里关闭
  delete _Comm; //在析构函数里释放内存 (当DLL文件结束运行时自动执行)
}
//---------------------------------------------------------------------------
int TMyDllEntry::OpenComm(int iPortNo)
{
  int iErr = 0;
  try
   {
     _Comm->PortNo = iPortNo;
     _Comm->PackageType = cptFrameHeadTail;
     _Comm->CommPort->Baud = 57600;
     _Comm->Active = true;
   }
  catch(EComm32Error &e)
   {
     iErr = e.ErrorCode; //串口的错误号
   }
  catch(Exception &e)
   {
     iErr = -1; //其他错误
   }
  return iErr; //返回错误号 (没有错误=0)
}
//---------------------------------------------------------------------------
void TMyDllEntry::CloseComm(void)
{
  _Comm->Active = false;
}
//---------------------------------------------------------------------------
void __fastcall TMyDllEntry::CommPackage(TObject *Sender, int NotifyType)
{
  //在这里处理 OnPackage 事件
}
//---------------------------------------------------------------------------
TMyDllEntry MyDll; //使用全局变量，DLL 装载时自动调用构造函数，退出时运行析构函数
//---------------------------------------------------------------------------
/////////////////////////////////////////////////////////////////////////////
//---------------------------------------------------------------------------
#ifdef __cplusplus
extern "C" { //DLL 导出的接口函数从这里开始
#endif
//---------------------------------------------------------------------------
int __export WINAPI OpenComm(int iPortNo)
{
  return MyDll.OpenComm(iPortNo); //打开串口，返回错误码，没有错误返回零
}
//---------------------------------------------------------------------------
void __export WINAPI CloseComm(void)
{
  MyDll.CloseComm(); //关闭串口
}
//---------------------------------------------------------------------------
// 在此处添加其他 DLL 导出的函数
//---------------------------------------------------------------------------
#ifdef __cplusplus
} //extern "C" //DLL 导出的接口函数到这里结束
#endif
//---------------------------------------------------------------------------

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