>http://cui.unige.ch/db-research/Enseignement/analyseinfo/IDL/BNFindex.html This is OMG IDL, no? As I understand it, MIDL is based on DCE IDL. The Open Group have a DCE IDL compiler which is freely available. It requires the DCE runtime. -- Luke -- Luke Howard PADL Software Pty Ltd http://www.padl.com