A text file is a 'serial' device and not obvious limit. A line is simply x characters followed by carriage return + line feed

If you write to a file serially, you can write freely

The real story begins when you try to use the file

With some tools, there are limits to the length of a line (causes truncation or wrapping); the printer is a device where thi is visible
When you read the line back, the host (e.g VB) may have limits.