Line lenght can be more than 254 bytes and before the time of proccesing I don't know lenght of a specific line.

You can use FGET to read text file line by line and compare

>Any ideas how to find string between two unique strings in TXT file without using FILETOSTR command?
>For example I need to find string
>
>aa
>bb
>cc
>
>in TXT file
>
>1111
>2222
>3333
>first string:aa
>bb
>cc
>second string:fsdfsdfs
>444
>555