Hi Chung,

You can tie into the objects and methods of Microsoft Office Word 2003
in conjunction with Microsoft Visual Basic .NET to create a simple spell-checker
whose functionality you can add to your own applications.
While you can use the spell-checker intrinsically from Word, this functionality is also
exposed to other applications using the object model. This means that you can also
use these features in your own applications.

The following article looks at the objects, methods and techniques used to implement a
spell-checker programmatically in a Microsoft Visual Basic=AE .NET application.

[Creating a Custom Spell-Checker with Word 2003 and Visual Basic .NET]
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odc_wd2003_ta/h
tml/odc_wdspellchkr.asp

It has a working sample that you can download and use it.

HTH

Mona

refer to the link

Adding Spelling & Grammar Checking Functions into VB.NET Applications

http://www.gotdotnet.com/Community/UserSamples/Details.aspx?SampleGuid=22a1527b-
9833-4d01-bab7-ad16a1677f12