how to check content exist or not

[paydot]

hi admin,
how to check the content in the text

 

[rostonix]

http://screencast.com/t/mcgpnfka

 

[paydot]

oh sorry my english,i am china
my mean is check the content in the file
example aaa.txt
aaa.txt content is
111
222
333
444
555
666
.....
999
.....

i want to check 999 is in the aaa.txt yes or not
thanks

 

[rostonix]

http://zennolab.com/discussion/threads/search-in-list-and-tables-via-c-macro.10733/