[ct-user] Radio Interface with a laptop

[Al - N1API]

Can anyone tell me how to key both CW and also interface a radio with a 
laptop that has only USB ports?
Is something commercially available for interface or do I have to build 
something?  Is there a place where
schematics or diagrams are available?

I have a laptop and would like to use a CW keying program on it.  I'm 
not particularly concerned with paddle
support.  I may try the character version of CT too, as the laptop's OS 
is Vista Home Premium, so there is
no DOS support.

Thanks

Al