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The OS/2™ Presentation Manager™ provides an integrated graphical, windowing user interface to IBM's OS/2 operating system. This paper addresses a primary area of interest for Presentation Manager application developers: the use and development of user controls. A control in the Presentation Manager environment is a program object with a programming interface and application function. The structure and interfaces between controls and the system are described in order to provide an understanding of the correct procedure for programming the Presentation Manager efficiently.
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