TActionList有个标准动作TDownLoadURL,内部是使用的URLDownloadToFile,它下载文件时会定时产生OnDownloadProgress 事件,这样就可以用进度条显示: uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, ExtActns, ActnList, StdCtrls, ComCtrls; type TForm1 = class(T