display tooltip on hover the header columns of a grid

Question

Hi,

I have one table(table 1) containing some records , which i am displaying in a gridview on click of a button in a asp.net web application.Now , whatever columns i have, in that table 1, those columns along with brief description/definition of them are maintained in different table(table 2).Now, on doing hover over the columns which are now displayed in gridview as headers , i want it should display the definition/description of that particular header as a tooltip.

As of now, i have used the tooltip property of <header template> of gridview and hardcoded the definition their.But i want that on hovering the header column of a grid, it should pick its description from the table where its description is stored.Can someone help me through this?


Thanks in advance.