library Project1;

uses
  SysUtils,
  Forms,
  Windows,
  Classes,
  Controls,
  Dialogs,
  Unit1 in 'Unit1.pas' {Form1},
  DM in 'DM.pas' {DataModule1: TDataModule};

{$R *.RES}

procedure DLLMain(Reason: integer);
begin
  case Reason of
    DLL_PROCESS_ATTACH:
    begin
       application.CreateForm(TDataModule1, DataModule1);
    end;
    DLL_PROCESS_DETACH:
    begin

    end;
    DLL_THREAD_ATTACH: begin end;
    DLL_THREAD_DETACH: begin end;
  end
end;

//記住，在Delphi里字符串參數需要用PChar類型定義
procedure show_demo(handle : THandle;const param : pchar); stdcall;
var
   oldHandle : THandle;
begin
 //保存dll的句柄
 oldHandle := Application.Handle ;
 //把DLL的應用的句柄改為PB里的窗口的句柄
 //目的是為了達到DLL和PB的可執行文件是屬于一個應用程序
 //效果：打開DLL里的窗口后，在任務欄里不會多出現一個圖標
 Application.Handle := handle ;
 Application.CreateForm(TForm1, Form1);
 try
      Form1.s_param := StrPas( param );
      Form1.ShowModal;
 finally
      Form1.Free;
      Application.Handle := oldHandle ;
 end;
end;

exports
  show_demo;

begin
  DllProc := @DLLMain;
  DllMain(DLL_PROCESS_ATTACH)
end.