idlwave-create-user-catalog-file
    
    idlwave-create-user-catalog-file is an interactive compiled Lisp function in `idlwave.el'.
(idlwave-create-user-catalog-file &optional ARG)
Scan all files on selected dirs of IDL search path for routine information.
A widget checklist will allow you to choose the directories.  Write
the result as a file `idlwave-user-catalog-file'.  When this file
exists, it will be automatically loaded to give routine information
about library routines.  With ARG, just rescan the same directories
as last time - so no widget will pop up.