Delphi控制电脑蜂鸣器或扬声器发声音，有些称之为喇叭，不过测试发现，这个是优先机箱蜂鸣器发出声音，或没装蜂鸣器，则会从音箱中发声音，实现的代码很简单，以下代码即可实现：
procedure TForm1.Button1Click(Sender: TObject);
var
i,j : integer;
begin
for i := 1000 to 2000 do
begin
j := i;
windows.Beep(1000,3000);
end;
end;
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000877s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.076574s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001067s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002186s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000922s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003233s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000730s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003832s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015784s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001158s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 297609 [ RunTime:0.016677s ]
