## About This Book This book provides information and code examples to enable you to start writing source code, using the functions in the **Presentation Manager** application programming interface (API) of the OS/2 operating system. ## Who Should Read This Book The _Presentation Manager Programming Guide - The Basics_ is intended for application programmers who want to create programs using the windowed, message-based Presentation Manager user interface. The basic concepts and features of this interface are discussed in this guide, including: windows, messages, controls, input/output, and system features such as the clipboard and timers. Details of messages, programming functions, and data structures used in application development are also included.

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