unit1.pas

来自「《深入Delphi的多媒体编程》实例源代码」· PAS 代码 · 共 57 行

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Timer1: TTimer;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    MainDir:String[80];//程序目录
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
 Close;
end;

//循环播放图标图片
procedure TForm1.Timer1Timer(Sender: TObject);
begin
   case Timer1.Tag of
    0:Form1.Icon.LoadFromFile(MainDir+'Icon\'+'Icon1.ico');
    1:Form1.Icon.LoadFromFile(MainDir+'Icon\'+'Icon2.ico');
    2:Form1.Icon.LoadFromFile(MainDir+'Icon\'+'Icon3.ico');
    3:Form1.Icon.LoadFromFile(MainDir+'Icon\'+'Icon4.ico');
   end;

   if Timer1.Tag>2 then//更新图片
    Timer1.Tag:=0
   else
    Timer1.Tag:=Timer1.Tag+1;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
 MainDir:=ExtractFilePath(ParamStr(0));//获取程序目录
end;

end.