demomydllunit.pas

很好地delphi书籍源码

unit DemoMyDllUnit;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TDemoMyDllForm = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  DemoMyDllForm: TDemoMyDllForm;
function GetMyDateTime : TDateTime;
  stdcall; external 'MyDll.dll';
function GetMoney(T:Pchar):double;
  stdcall; external 'MyDll.dll';

implementation

{$R *.dfm}

procedure TDemoMyDllForm.Button1Click(Sender: TObject);
var
  A:double;
begin
  A:=GetMyDateTime;
  Caption:='时间'+DateTimeToStr(A)+format('的值是: %8.0f',[50000*A]);

end;

procedure TDemoMyDllForm.Button2Click(Sender: TObject);
begin
  Caption:=Format('你输入的费用是:%10.2f ',[GetMoney('商务费')]);
end;

end.