Documentation

Writing OS/2 Warp Device Drivers in C - Steven J. Mastrianni The most authoritative text for anyone developing an OS/2 device driver.
Writing VX-REXX Programs - Ronny Richardson REXX is both extremely easy to use and very powerful. However, REXX has a command-line interface that seems out-of-date for the graphical user interface (GUI) of OS/2. Additionally, this command-line interface requires a great deal of coding to put all but the simplest information on the screen.