>I wrote a simple program to convert the records of a table to a text file, with some specific format.
>
>Everything works fine, except, my client has an NT environment, and for some reason, it interprets my CHR(13) as a black square character, instead of a return character I expected.
>
>Since this happens, I cannot upload the text file to it's destination, because it won't acknowledge this format.
>
>Thank you all for your comments.

Try replacing your CHR(13) with a CHR(13)+CHR(10) pair (CR/LF).