copy functionality in table control in module pool

Hello Gurus,

    I have created a module pool with table control wizard.Now with the wizard I got INSERT,DELETE,PAGE UP...etc the standard button which we get with wizard.Now I want to add copy button.I searched through links but couldn't able to find the way.I have used a button with TC_Copy  name.How to enable the copy functionality.Either by button or by Short key of copy button.

Thanks

Gaurav Gautam