Regular Expressions 101

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/
TextData=(?P<Query>[*\w\W]);NTCanonicalUserName
/
gm
TextData= matches the characters TextData= literally (case sensitive)
Named Capture Group Query
(?P<Query>[*\w\W])
Match a single character present in the list below
[\w\W]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\w matches any word character (equivalent to [a-zA-Z0-9_])
\W matches any non-word character (equivalent to [^a-zA-Z0-9_])
;NTCanonicalUserName matches the characters ;NTCanonicalUserName literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gm

Test String