editor functions

Two questions.

1.
In FRED (MCL), there is a Search Files options in the tools menu that  
allows for searching an entire directory for a string.
Lispworks has a function editor:search-files with a key :files that  
takes a list of pathnames.
The example give '(".login" ".cshrc") as the argument to :files.

The logical pathname "Lispworks:myfolder;" seems to signal an error.  
What is wrong?

2.
In FRED (MCL), there is a find-definition function that returns the  
file of a class-name.
Is there a similar function in Lispworks?

Thanks,
Sheldon