Написание plugin к программе

#ifndef __RC_PLUGIN_H__
#define __RC_PLUGIN_H__
 
#define RC_EXPORT_TYPE  __declspec(dllexport) __cdecl
 
#pragma pack(push,1)
 
#define WPARAM_SEND_RC_CODE                 0x01023004
// For example ::PostMessage(hCommandWmd,WM_USER,WPARAM_SEND_RC_CODE,"Record");
 
struct TRcPluginInfo
{
    int     m_StructSize;
    HWND        m_hCommandWnd; //to plugin
    wchar_t*    m_pConfigName; //to plugin
    wchar_t     m_Name[100];   //from plugin
};
 
 
extern "C" bool RC_EXPORT_TYPE  RcGetInfo(TRcPluginInfo*info);
extern "C" bool RC_EXPORT_TYPE  RcStart();
extern "C" void RC_EXPORT_TYPE  RcStop();
extern "C" void RC_EXPORT_TYPE  RcShowDialog(HWND hwnd);
 
 
 
#pragma pack(pop)
 
#endif //__RC_PLUGIN_H__

//---------------------- Unit2.cpp -----------------------------------------
#include <vcl.h>
#include "Unit2.h"
 
extern "C"           //  resurs.rc    SDplug.def
{
void __cdecl On_Start()  { ; }
void __cdecl On_Send_Dll_ID_Name(char *Name) { strcpy(Name,"SDplug"); }
}
//---------------------- Unit2.h -----------------------------------------
#ifndef _UNIT2_H_
#define _UNIT2_H_
 
extern "C"
{
 void __cdecl On_Start();
 void __cdecl On_Send_Dll_ID_Name(char *Name);
}
#endif
;//---------------------- SDplug.def ----------------------------------------
LIBRARY SDPLUG
EXPORTS
    On_Send_Dll_ID_Name = _On_Send_Dll_ID_Name @2
    On_Start = _On_Start @1
;//--------------------------------------------------------------------------

    void __cdecl On_Exit() {};
    void __cdecl DVBPLGClose() {};

    void __cdecl On_Exit() {};
    void __cdecl DVBPLGClose() {};
    void __cdecl OnClose () {};

procedure On_Exit(MDInstance:LongWord;MDWnd:LongWord;Log_Set:BOOL);cdecl;
begin
  inifile.Free;
  mythread.terminate;
  form1.close;
end;