Thread Anfängerfrage

[Spurius]

Hallo,
das ist meinThreadcode:

Delphi-Quellcode:

unit threadtest;

interface

uses
  Classes,idtcpclient,dialogs,StdCtrls,sysutils;

type
  tmythread = class(TThread)
  private
    fclient:tidtcpclient;
    fmemo:tmemo;
    procedure updatememo;
  protected
    procedure Execute; override;
  public
   constructor create(const aclient: tidtcpclient;
   const amemo: tmemo);

  end;

implementation
uses modul;

constructor tmythread.create(const aclient: tidtcpclient;
         const amemo: tmemo);
begin
 inherited create(true);
 fclient := aclient;
 fmemo := amemo;
 resume;
end;

procedure tmythread.Execute;
begin
 while not terminated do
   if fclient.  then      //<- hasdata ???
   synchronize(updatememo)
  else
   sleep(100);
end;


procedure tmythread.updatememo;
begin

 fmemo.Lines.Append(fclient.ReadLn);
end;
end.

Was ist in deinem Code wesentlich anders? Oder was soll ich ändern?
Gruß
Spurius