If the other components expose a COM interface you can just add a reference and use the interface directly.  Releasing is a bit fiddly but not much, otherwise it's quite straightforward (I've done evil things such as Lotus Notes (spit) interop before, so I can be fairly certain this works!)  If you don't want that you could otherwise just write them as standard DLLs and use dllimport.  See http://msdn.microsof...8(v=vs.71).aspx for some more info.

If the other components expose a COM interface you can just add a reference and use the interface directly.  Releasing is a bit fiddly but not much.  If you don't want that you could otherwise just write them as standard DLLs and use dllimport.  See http://msdn.microsoft.com/en-us/library/aa288468%28v=vs.71%29.aspx for some more info.