Thread--------------------------------

unit Unit2;

interface

uses
  Classes , IdHTTP;

type
  TPrimeThrd = class(TThread)
  private
  idHTTP1: TidHTTP;
  FResultString: string;
  protected
  procedure UpdateResults;
  procedure Execute; override;
  public
   filename:string;
  end;

implementation

uses SysUtils, Dialogs, unit1;

procedure TPrimeThrd.UpdateResults;
begin
Form1.Memo1.Lines.Add(FResultString)
end;

procedure TPrimeThrd.Execute;
begin
idhttp1:=TIdHTTP.Create(nil);
FResultString:=idhttp1.Get(filename);
Synchronize(UpdateResults);
end;

end.
----------------main form----
procedure TForm1.Button5Click(Sender: TObject);
var
newthread1,newthread2:TPrimeThrd;
begin
newthread1:=TPrimeThrd.Create(true);
newthread1.FreeOnTerminate:=true;
newthread1.filename:=listbox1.Items[0];
newthread1.Resume;
end;
end.