89 lines
3.6 KiB
HTML
89 lines
3.6 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>Session Services APIs</title>
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<!-- Begin Header Records ========================================= -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!-- DSMMST1 SCRIPT A converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 29 Jan 1999 at 16:05:09 -->
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<!-- File Edited November 2001 -->
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<!-- End Header Records -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<!-- Java sync-link -->
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<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
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</script>
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<h2>Session Services APIs</h2>
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<p>The session services APIs provide a general scrolling I/O interface. They
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can be used to build a standard input-line scrolling interface or an interface
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that has an output-only scroll area (called a <strong>scroller</strong>) in a
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window. Sessions are special cases of windows as supported by the window
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services. A session is defined using a session, a window, and a low-level
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environment description. The window and low-level environment descriptions are
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the same as those used to define a window directly with the window services
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APIs. The session description defines the structure of the session. The
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structure includes the coordinates of the scrolling portion, the length of the
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input line, the amount to roll by, and so on. A session is implemented as a
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window, where the window user data pointer describes the session itself. Thus,
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a session can be manipulated through the window and low-level interfaces by
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passing the session handler or through the session interfaces. This
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implementation is similar to the concept of inheritance in object-oriented
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programming languages.</p>
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<p>Sessions are similar in concept to subfiles and can be used for any
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application that requires a scrolling line interface. The session services APIs
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are divided into the following functional groups:</p>
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<ul>
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<li><a href="dsm3a.htm">Session manipulation and query APIs</a> allow you
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to create, query, and manipulate sessions.<br>
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<br>
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</li>
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<li><a href="dsm3b.htm">Session I/O APIs</a> allow you to perform input and
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output operations to sessions.</li>
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</ul>
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<p>For additional information, select one of the following:</p>
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<ul>
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<li><a href="dsm3c.htm#Header_594">Session Details</a></li>
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<li><a href="dsm3c.htm#Header_595">Line Mode and Character Mode I/O</a></li>
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<li><a href="dsm3c.htm#HDRCMDKEY">Command Key Action Routines</a></li>
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<li><a href="dsm3c.htm#Header_597">Action Routine Parameters</a></li>
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<li><a href="dsm3c.htm#HDRACTPOS">Active Position</a></li>
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<li><a href="dsm3c.htm#HDREBCDICC">EBCDIC Display Control Characters</a></li>
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<li><a href="dsm3c.htm#HDRSSDBCS">DBCS Considerations</a></li>
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</ul>
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<br>
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center">
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<a href="#Top_Of_Page">Top</a> |
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<a href="dsm.htm">Dynamic Screen Manager APIs</a> |
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<a href="aplist.htm">APIs by category</a></td>
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</tr>
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</table>
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</center>
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<br>
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</body>
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</html>
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