Editing records in Datagrid with customized button.

Question

Dear friends, I have following problem. I am using datagrid to edit records in it. I am using to edit a particular record. code is as follows. This Edit command column has buttontype property which has linkbutton or pushbutton as values. Linkbutton will have a link and pushbutton will have a normal button. Now the problem is I want to use other button(.gif image) other than linkbutton and pushbutton for editing records. How to do this? Please help. Regards Amol