The BEST source of TAPI information I could find when I needed to write a TAPI app for a customer was: Windows Telephony Programming: A Developer's Guide to TAPI by Chris Sells. published by Addison Wesley, copyright 1998. ISBN 0-201-63450-3 Bob Ammerman RAm Systems (contract development of high performance, high function, low-level software) -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body