VMS Help DCE_IDL, ARGUMENTS, -confirm  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   -confirm

   Displays all the idl command arguments you chose, but does not
   compile the source IDL file.  If you use this with the -v argument,
   informational messages about how the compiler behaves if you do not
   use -confirm are displayed but no corresponding actions are performed.