Bilgisayar Ne Zamandır Açık?

function Uptime: string;
  var
    count,
    days,
    min,
    hours,
    seconds  : longint;
  begin
   Count := GetTickCount();
   Count := Count div 1000;
   Days := Count div (24 * 3600);
   if Days > 0 then
    Count := Count - (24 * 3600 * Days);
    Hours := Count div 3600;
   if Hours > 0 then
    Count := Count - (3600 * Hours);
   Min := Count div 60;
   Seconds := Count mod 60;
   Result := IntToStr(Days)+' Gün '+IntToStr(Hours)+
             ' Saat '+IntToStr(Min)+' Dakika '+
             IntToStr(seconds) +' Saniye ';
  end;
Kullanımı

Kod:
Edit1.Text:=Uptime;