Extending native components

Can anyone provide any direction in extending existing SSIS components with a custom component, if it's possible at all. In some cases there are just slight bits of functionality missing that I think I could add in myself. But, I'm not much of a programmer and need a bit of help in the declaration of the component in my own custom component.

Thanks.I don't beleive this is possible. Whilst I am looking at the managed interfaces, not native code, they are all documented as sealed or not inheritable.