Please refer to the following URL to know the differences between CCW and RCW,http://onlydifferencefaqs.blogspot.in/2012/07/net-framework-difference-faqs-1_11.html

CCW - COM Callable Wrapper where the dlls which creted using .NET environment and using this COM to VB or other applications.

RCW - Runtime Callable Warapper where the dlls created in any prior version of .net like VB6 and adding those DLLs to .NET environment using add reference and some other import options.

By

Jollykid

CCW - COM Callable Wrapper where the dlls which creted using .NET environment and using this COM to VB or other applications.

RCW - Runtime Callable Warapper where the dlls created in any prior version of .net like VB6 and adding those DLLs to .NET environment using add reference and some other import options.

By

Jollykid

ccw is called com callable wrapper where as rcw is called as
runtime callable wrapper.