unit2.cpp

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//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "Unit2.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
HINSTANCE hComm;
void __stdcall (*OpenMyForm)(HWND);
void __stdcall (*CloseMyForm)(void);
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
  hComm=LoadLibrary("MyForm.dll");
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  FARPROC lpFarProc;
  if(hComm!=NULL)
  {
    lpFarProc = GetProcAddress(hComm,"OpenMyForm");
    if(lpFarProc==NULL)
      ShowMessage("func Error");
    else
    {
      OpenMyForm = (void __stdcall (__cdecl*)(HWND))lpFarProc; //指针类型转换
      OpenMyForm(Application->Handle);
    }
  }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormDestroy(TObject *Sender)
{
  FreeLibrary(hComm);
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender)
{
  FARPROC lpFarProc;
  if(hComm!=NULL)
  {
    lpFarProc = GetProcAddress(hComm,"CloseMyForm");
    if(lpFarProc==NULL)
      ShowMessage("func Error");
    else
    {
      CloseMyForm = (void __stdcall (__cdecl*)(void))lpFarProc; //指针类型转换
      CloseMyForm();
    }
  }
}
//---------------------------------------------------------------------------