>Hi,
>
>What is the size of each line in txt file ?

There's no fixed size for the generic text file type; in general, text files are variable length collections of records that are terminated with carriage return/line feed - CHR(13) + CHR(10) - pairs marking the end of each line. If the file is not created on a Windows-environment computer (eg a Mac or Unix box), the terminator may vary - for example, it may expect only a linefeed character to end the line. The last line may not have a terminating character at all, and in some cases, an end-of-file mark (CHR(26)) may be used to indicate the end of file condition.

If you're receiving data from another program with fixed-length records, the other program would establish the line length.

In old DOS systems, designed for output on normal letter paper using 1/4" margins and 10 characters/inch, a line would be 80 characters long. If it used 12 CPI (typically referred to as Elite as opposed to Courier font) it would be 96 characters per line. This assumes a monospaced font where all characters are equal width; proportional fonts don't have regular character spacing.

What are you trying to do?