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Somebody knows how to ignore capitalization with regular expression in Notepad++?

From shell it works as follows:

egrep -i '^(FroM|SuBjeCT|DatE): ' filename.txt

Thanks in advance.

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You can use the ?i modifier.

(?i)(from|subject|date)
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In the Find dialog use the Match case checkbox to choose whether you want case-insensitive searching or not, ie. leave it UNCHECKED to ignore capitalization with NotePad++ regular expressions.

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