I was wondering if there is another way to spell check a Windows app instead what I\'ve been of using: \"Microsoft.Office.Interop.Word\". I can\'t buy a spell checking add-
I use Aspell-win32, it's old but it's open source, and works as well or better than the Word spell check. Came here looking for a built in solution.
http://msdn.microsoft.com/en-us/library/system.windows.controls.spellcheck.aspx
If I were you I would download the data from the English Wiktionary and parse it to obtain a list of all English words (for instance). Then you could rather easily write at least a primitive spell-checker yourself. In fact, I use a parsed version of the English Wiktionary in my own mathematical application AlgoSim. If you'd like, I could send you the data file.
Update
I have now published a parsed word list at english.zip (942 kB, 383735 entries, zip). The data originates from the English Wiktionary, and as such, is licensed under the Creative Commons Attribution/Share-Alike License.
To obtain a list like this, you can either download all articles on Wiktionary as a huge XML file containing all Wiki- and HTML-formatted articles. This is then more or less trivial to parse. Alternatively, you can run a bot on the site. I got help to obtain a parsed file from a user at Wiktionary (I seem to have forgotten his name, though...), and this file (english.txt in english.zip) is a further processed version of the file I got.