Datagrid Paging in content page

Question

Hi all,
I have created an web application in ASP.NET 2.0 (using C#).  The functionality I am implementing is search engine of site. I am not using any utility for that. I have used a code from internet.
Now my search text box and button is in master page and my data grid is in content page . So when user will click on search button, I can fill data grid.
For this I will write my code on master page code behind and then I will access datagrid from master page. But after this I have 1  problem and it is how and where I will have to handle paging code for datagrid ?
Can any one please help me in this ?
 
Thanks and Regards
Prasad . G . Godbole