Add COM+ roles using VB Code

Hi Experts,

I wanted to know how to add existing roles to a component that i add. I have got 3 roles and i want to add these to the components.
I have done most of the code to add a role but could not get the role checked in the security tab od the COM+.

In simple, How do i add a role to a component using vb code.
any sample would be of great help.

working sample contains 100 pts extra.

Thanks in Advance for all the Experts,
Bhalpa