Ever since I started using Notepad++ for my blogging, I needed spell check in the program. The biggest reason why I use a text editor in the first place is because this way I can write whatever HTML code I want instead of the WYSIWYG editor not giving me what I want.
Either way, the program is called ASpell, and the instructions for how to get it set up are here.
In the instructions, under step number 4, I had to make a slight change to the procedure since the program didn’t ask me for the configuration right away. I had to click through some menus to find it. I believe inside the Notepad++ program, I clicked Plugins > Spell-Checker > Spell-Checker, and then it asked me for the configuration, so I pointed it to the place that the instructions said (“C:\Program Files\Aspell\bin”). Also, this spell checker requires the plugin and the dictionary to work. Make sure both are installed.
I should also mention that the program itself does a good job in checking the spelling of words, but since I’m using it on HTML code, it complains about my html tags, so I just added those tags to the dictionary so it doesn’t bother me with them again. And also some words, it doesn’t quite recognize like the word “plugin” and “blogging”.
Link: http://www.question-defense.com/2008/11/05/install-spellcheck-for-notepad-on-windows
Henry Poon's Blog 
Very good.. worked like magic for me .. thanks a ton
That’s good to hear! Thanks!
Hello,
Do you know if it’s possible to add Spellcheck to Notepadd++ on Windows 8 ?
Thanks.
I’ve never tried! I can’t imagine the process to be much different though. You should try it and let me know how it goes!
Perfect and consise, thank you!
Awesome! Thanks!
thanks..your post helps
Glad this helped!
thanks for the info….on a side note…can’t u just switch off the plugin for spellcheck while working on html?
Yeah I could. The reason I left it on was because I wanted the plugin to check the body paragraphs in my HTML file.