Web Forms :: How To Design Email Applications In C# Alongwith Sql 2000

I want to develop a webapplication as same like gmail where i am having one Gridview and some buttons like INBOX,OUTBOX,SENT ITEMS,COMPOSE MAIL and MOVE TO INBOX,MOVE TO UNREAD,MOVE TO READ etc. when ever user clicks on Button INBOX ,gridveiw must show all emails which were not read in bold letters and when he clicks on SENT ITEMS gridview must show all mails which are sent by that user like for all Button controls based on the Database table status.

I have one table in DB which was named as EmailsInfo in which i have different fields like From,To,Subject,Time,Status(which has to show whether email was read by user or not i.e if user read email then status will be read and ifnot status will be unread ).

To be exactly like gmail application except some features?

I have designed upto somepart i.e my gridview is displaying all email info from database table but i was stuck here,how can i display emails based on read or unread by user in gridview