应用背景使用CRectTracker类，在对话框上绘画橡皮条矩形，使用鼠标可以移动矩形、放大或缩小-Use CRectTracker class, drawing on the dialog rubber rectangle, use the mouse to move the rectangle, zoom in or out.关键技术对话框图像显示，及橡皮筋效果，图片不闪烁，使用鼠标可以移动矩形、放大或缩小。你可以画画图片控制橡皮筋矩形,可以直接使用
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001103s ]
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:0.076887s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.014223s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001651s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001589s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.002993s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000855s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003668s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014151s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001097s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 216590 [ RunTime:0.018029s ]
