摘要：
用URLDownloadToFile下载文件，如何用进度条跟踪下载进度1：OnDownloadProgress2：可有否具体的例子。3：unit Unit1;interfaceusesWindows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,Dialogs, StdCtrls, ExtActns, ComCtrls;typeTForm1 = class(TForm)ProgressBar1: TProgressBar;Label1: TLabel;Button1: TButton;procedure Fo 阅读全文