About datagrid control in asp.net using vb code

Hi! Please help me.Now I am working with my project called customer order confirmation .Can u give me the code for this solution.How to add the details of a customer directly through the datagrid control during the runtime,how to add column with a editable textbox to age of the customer in that column during thr runtime,how to delete the selected details of the customer with checkbox inside the datagrid but with a button outside the datagrid same as rediffmail inbox delete option?