change gridview mode to edit mode

Question

hi.. like orkut scrapbook..

In our own scrapbook.. when we click on "reply" link it shows the textbox to reply..

if we want to do such with gridview than how to do?

i have page of scrapbook and in that it shows user's scraps, delete button bt i am confused about how to use that "Reply link" 

so can anyone tell me?