This reference book provides programmers with descriptions of the application programming interfaces (APIs) provided by the IBM Operating System/2 for OS/2 Warp Servers, LAN Servers, and the Directory and Security Server. These APIs provide the functional interface for server and client application development.

The OS/2 operating system referred to in this book is OS/2 Versions 2.1 through OS/2 Warp 4 (with the applicable CSDs and ServicePaks applied).

This book also provides the OS/2 Warp Connect LAN Requester APIs. These APIs are 32-bit and are generally consistent with the Net32xxx and Dos32xxx LAN APIs that ship with LAN Server 4.0.

DOS refers to DOS versions 3.3, 5.0, 6.x, or 7.0.