The Progress Standard Libraries In general the libraries are compatible with Progress version 9 and upwards and are O/S neutral, unless noted differently. To install the libraries place the slib/ directory in a directory on your PROPATH and you're ready to go, no need to change your PROPATH. I usually just copy the slib dir to every project I do. To use a library add the library include file to the external procedure file. Although the libraries are essentially persistent super procedures.