Given that the original poster asked about using "tee.exe", I assume he's running a Windows variant. Neither csh nor the bourne shell nor even dd is installed on Windows by default; and so it's not a great idea to assume that his default shell isn't just "command.com" in his case.

Your points are all correct; just probably a bit too UNIX centric for the original poster to make use of. It's nice to want to help, but let's try to pick up on the subtle cues (operating system in use, etc.) that will make our advice that much more useful to the people who ask for it.

The wiser we all try to be, the more powerful the monestary will become, until one day we TAKE OVER THE WORLD!!! :-)