set-message in drscheme:frame:name-message%

Sets the names that the button shows.

• (send a-drscheme:frame:name-message set-message name short-name) -> void
     name : (union string #f)
     short-name : string

  The string short-name is the name that is shown on the button and name is shown when the button is clicked on, in a separate window. If name is #f, a message indicating that the file hasn't been saved is shown.