Manipulate file in Windows

[Dublanc, David]

Hello,
I have to manipulate big text files (more than 100 M ) on Windows and Unix.

I have several questions :

How can I count lines fastly ? ( wc -l in Unix...)

When I have the total number of lines, I have to split the file into x files
of 1000 lines. How can I do this fastly ?

Are there functions to replace x lines of a file by y another lines ? To
delete the x to y lines in a file ?

In brief, I am looking for useful file functions that I cannot find in the
Library reference....

Thanks.


--
David