CodeSpell for Visual Studio 2005 Manual

Solution Spell Checking

CodeSpell can check an entire solution, from Tools|Check Solution Spelling. This will display a tool window and start a background spell check thread, which will update a progress bar as it goes. This way, you can keep working while it checks. When CodeSpell is finished, the tool window, will show all spelling errors in your solution, grouped by file. Simply click on an error to navigate to it.

You can think of solution spell check as a search feature that lists all your spelling errors in a solution, letting you navigate to those errors to correct them.