how to write specific line

[au3scr]

How to write specific line?

Here i can specify only name and line, but how i do if I need to write secific line?

FileWriteLine($filename,"line")

but how i do if I need to write specific line?

I want write : in filename in line 17 "my text"

I need it to modify 17th line in config file

[Swift]

#Include <File.au3>
_FileWriteToLine()