This tells The Key to read one or more lines of arguments from a file. This is useful for copying long lists of files. For example, suppose PROGFILE.CPY contains the following lines:
-di a:\ -do d:\ *.c = *.pas = w*.* = *.doc =
Then the argument `-f PROGFILE.CPY' would cause The Key
to read and interpret each of the lines in that file.
In this example, the result would be to copy all the
files in a:\
ending with .c, .pas, and .doc or beginning
with w to d:\
.