How to import plugin dll for Notepad++?

Dispath the dll file to installation folder of Notepad++ under "plugins" directory.

e.g.
copy ComparePlugin.dll to C:\Program Files (x86)\Notepad++\plugins
then reopen notepad++

How to wrap text in notepad++?

You may see the text according to your screen width. To do that;

Go to "View" -> Activate "Word wrap" -> That's all. :)

How to revert all sql lines into one line in Ultra Edit and Notepad++ ?

For example, you have a long SQL file and you must run it in command line or in such tool or program. For this, you can use Ultra Edit or Notepad++ tool for convert it.

Ultra Edit:
Open file via Ultra Edit -> Press CTRL + R -> Input ^p and space character in related columns -> Click Start button -> Click Replace All button

Notepad++:
Open file via Notepad++ -> Select desired lines -> Press CTRL + J

That's it.