To install Win32::Mechanize::NotepadPlusPlus, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Win32::Mechanize::NotepadPlusPlus
CPAN shell
perl -MCPAN -e shell install Win32::Mechanize::NotepadPlusPlus
For more information on module installation, please visit the detailed CPAN module installation guide.