How can see code of an flash component?

Hello Friends, I have a confusion about components that How we can see and update code of an flash component. Some component are the movie clip symbols but other are compiled symbol. I need to check code of compiled movie clip(flash component). Please give me solution. Thanks in advance. With best Himanshu vyas

What you need is a decompiler… go pickup a copy of sothink swf decompiler… the latest version.