I specifically mentioned the plain text $error value.
$error is an identifier filled when you use the goto :error but it is also a plain text value returned by some identifiers, $dde for example (I think there are some others but can't find them right now).
Using $false is the same idea as using plain text $error, but plain text $error makes more sense, nothing is false here.
Using plain text which looks like an identifier is (IMO) a bad idea for several reasons.
1. If you code this as you might naturally do, then it won't work:
if ($sfile(C:\) == $error) return
To make it work you have to code:
if ($sfile(C:\) == $ $+ error) return
2. "$error" is a valid file name. So if I select such a file in $sfile dialog how do you distinguish between the two?
For $sfile (or any identifier returning a file name) you would have to use text which is impossible to be a valid filename. According to Microsoft, the following characters are not valid in a filename: *?"<>|
How about using ? followed by an explanatory error message (either generated by Windows or mIRC)?
