function GetRunningTime:string;//获取计算机已运行时间
var
hour,minute,second,sumsecond:integer;
begin
sumsecond:=gettickcount div 1000;//运行的秒数
hour:=sumsecond div 3600;
minute:= sumsecond mod 3600 div 60;
second:=sumsecond mod 3600 mod 60;
result:=inttostr(hour)+':'+inttostr(minute)+':'+inttostr(second);
end;