Question

Does anyone know how to trim the $1 value?

' URL Replacement, www.Scirra.com
Dim objRegExp : set objRegExp = new RegExp
With objRegExp
    .Pattern = "\[url\](.*)\[\/url]"
    .IgnoreCase = True
    .Global = True
End With
strMessage = objRegExp.replace(strMessage, "<a href=""$1"" rel=""nofollow"">$1</a>")
set objRegExp = nothing

Example, if I enter:

[url] http://www.scirra.com[/url]

This renders as an unclickable link because of the %20 before it. What I’d like to do is something like:

strMessage = objRegExp.replace(strMessage, "<a href=""" & trim($1) & """ rel=""nofollow"">" & trim($1) & "</a>")

Answer 1

Surround your capturing group with \s* and, while you’re at it, change the pattern to avoid using .* (you want to capture everything but a [ or a space — use a complemented character class):

.Pattern = "\[url\]\s*([^\[\s]+)\s*\[/url\]"

(note: not sure the [ needs escaping in the character class)