Full Name:
How to: Check Spelling in Worksheets

Short Name:
How to: Check Spelling in Worksheets

Type of Entity:
C#

Abstract:
The CheckSpelling method displays the Spelling dialog box if it finds an incorrectly spelled word on the worksheet. Optionally, you can specify the name of a custom dictionary, a value indicating whether you want to ignore case, a value indicating whether to suggest alternate spellings when an incorrect spelling is found, and the language of the dictionary being used.

MSDN Source URL:
http://msdn2.microsoft.com/0zk8c4dw.aspx