Help with RegEx and new line

[nnnik]

I have an issue

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Msgbox % RegExMatch( " abc`n def", " abc`a def", matchObj )

All I want to do is match any new line in the needle ( putting `n won't help here )
The docs stated that

`a
In v1.0.46.06+, `a recognizes any type of newline, namely `r, `n, `r`n, `v/VT/vertical tab/chr(0xB), `f/FF/formfeed/chr(0xC), and NEL/next-line/chr(0x85). In v1.0.47.05+, newlines can be restricted to only CR, LF, and CRLF by instead specifying (*ANYCRLF) in uppercase at the beginning of the pattern (after the options); e.g. im)(*ANYCRLF)^abc$.

How do I use this feature?
Note:

Code: Select all

Msgbox % RegExMatch( " abc`n def", "`a)`a", matchObj )

doesn't work either

[Helgef]

That is for the options before the ) at the beginning of the needle, I haven't used it. I use \R in the needle to match new lines.
Cheers.
Edit 2:
Example usage msgbox % regexmatch("xyz`rabc","`am)^abc$") compare to msgbox % regexmatch("xyz`rabc","m)^abc$")

Spoiler

Edit:

`a alert (bell) -- corresponds to Ascii value 7. It can also be manifest in some applications by typing Control+G.

[nnnik]

Thanks \R will do the job - however this is still an issue.

[Helgef]

Did you see my edit? It goes together with the m option.

[nnnik]

Then the help description is just terrible here
Thanks for your help.