Notepad++ regex -> newLine

Question

I use Notepad++ and I need to delete all lines starting with, say \"abc\".

Attention, I don\'t need to replace the line starting with \"abc\" with a empty line, but

Answer 1

Try the regex \nabc.* in "Find and Replace" --> "Replace"
Leave "Replace With" field empty.

EDIT : This won't work with first like (because '\n' means "new line")