Add Search capability to Datagrid Control

Question

Hi Folks,
I am developing my application using vb.net and SQL server 2005... I have datagrid control on one of the forms which is bound too the data in SQL database using dataset method.... I am trying to put a search text box along with button to enter a search string and find the results accordingly on the data avilable in the grid and my plan is to highlight the result.
I hope u got the idea... Is anyone know how to do it....
Any comments or hints are warmly welcome...
Thanks in advance