应用背景使用visual studio 2010的MFC程序进行程序设计。可实现类似于windows屏幕的锁定功能亦可加上指纹识别的功能。实现指纹锁，当指纹吻合时解锁屏幕。关键技术使用VC的MFC程序，创建对话框。当点击锁屏时，屏幕锁定类似于电脑桌面的屏锁。此时若输入的密码正确，屏幕将解锁，失败则无反应。程序采用多线程设置，可加入指纹识别程序。通过指纹解锁屏幕。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001191s ]
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:0.084776s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001327s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001886s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001126s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003506s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000951s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003198s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014245s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001274s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 70097 [ RunTime:0.001408s ]
