I actually managed a small
text editor. it's definitely possible to str_cat a \n.
Code:
function line_feed()
{
str_cat(new_line,"\n");
wait(1);
inkey(new_line);
}
...
on_enter= line_feed;
However, this code will only work when inkey(); is disabled, so you have to hit enter twice (one to exit inkey, and the other to execute line_feed()).