Mex_New_User

I'm trying to create a macro using an input box to determine the name of a folder in macro express 3.5. For example, an input box pops up and I can type in "A". I want to then use the inputted text and make it the new folder name under a specific directory. I then want to copy all the files from an existing folder over to the newly created folder A. How would I got about creating a macro like this?