batchfile change line

[dani8190]

how to make a batchfile change a single line in any place in a textfile?

[aGerman]

This is not possible. You could read the file line by line, change what you want, write it to a new file and finally replace the old file.
Explain what you wanna do.

[!k]

dani8190
You can use an external utility sed (GNU and super-sed versions is guaranteed) with a key --in-place