ISS45 Application Program Interface
Select the link above for the DOS or NT API you require.  These APIs are the 7.6.0 an the most recently released 7.7.1 versions, and are downward compatible to ensure proper operation with applications written with earlier ISS45, RPS/Supermarket and PC-Master APIs.

The files will download as self-extracting executables, including all available files, READMEs and documents.