270 lines
7.8 KiB
HTML
270 lines
7.8 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>Save Screen (QsnSavScr) API</title>
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<!-- Begin Header Records ========================================== -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!--File Edited October 2001 -->
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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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<a name="top_Of_Page"></a>
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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>Save Screen (QsnSavScr) API</h2>
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<div class="box" style="width: 65%;">
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<br>
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Omissible Parameter Group:<br>
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<!-- iddvc RMBR -->
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%">1</td>
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<td align="left" valign="top" width="50%">Saved data command buffer handle</td>
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<td align="left" valign="top" width="20%">Output</td>
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<td align="left" valign="top" width="20%">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">2</td>
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<td align="left" valign="top">Command buffer handle</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">3</td>
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<td align="left" valign="top">Low-level environment handle</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">4</td>
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<td align="left" valign="top">Error code</td>
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<td align="left" valign="top">I/O</td>
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<td align="left" valign="top">Char(*)</td>
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</tr>
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</table>
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<br>
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Returned Value:<br>
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%"></td>
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<td align="left" valign="top" width="50%">Saved data command buffer handle</td>
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<td align="left" valign="top" width="20%">Output</td>
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<td align="left" valign="top" width="20%">Binary(4)</td>
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</tr>
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</table>
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Service Program: QSNAPI<br>
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<br>
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Threadsafe: No<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The Save Screen (QsnSavScr) API saves the current state of the display. If
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this is a direct operation, the API creates a command buffer that contains the
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operations used to restore the screen state and returns a handle for this
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buffer. When a direct save screen operation is issued, the saved screen data is
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returned in a command buffer. This command buffer contains the Restore Screen
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command along with the data to restore the screen. Additional commands can be
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added to the command buffer as described in <a href="QsnRstScr.htm#HDRRSTCNS">
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Restrictions</a> under the Restore Screen (QsnRstScr) API. The screen can be
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restored by sending this command buffer using the Put Command Buffer
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(QsnPutBuf) API.</p>
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<p>When an indirect save screen operation is issued, the Save Screen command is
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stored in the command buffer and is considered an input operation. The command
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can be issued to the screen only through the Put Command Buffer and Perform Get
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(QsnPutGetBuf) API. The saved data will be returned in the input buffer
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parameter specified for the QsnPutGetBuf API. The screen can subsequently be
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restored by specifying this input buffer on the QsnRstScr API.</p>
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<p>This command corresponds directly to the 5250 Save Screen (when the
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underlying control unit supports it) or Save Partial Screen command. See the
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5250 data stream documentation for details.</p>
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<br>
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<h3>Authorities and Locks</h3>
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<p>None</p>
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<br>
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<h3>Restrictions</h3>
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<p>This command must be the last command in the command buffer, except when GUI
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support is available. In this case, other non-input commands may follow.</p>
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<br>
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<h3>Omissible Parameter Group</h3>
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<dl>
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<dt><strong>Saved data command buffer handle</strong></dt>
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<dd>OUTPUT; BINARY(4)
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<p>The variable that will contain the command buffer handle for the restore
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screen operation if this is a direct operation.</p>
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<p>For an indirect operation, the result of the save screen will be returned in
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the input buffer of a subsequent input operation, which can be used to restore
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the screen using the QsnRstScr operation.</p>
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</dd>
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<dt><strong>Command buffer handle</strong></dt>
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<dd>INPUT; BINARY(4)
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<p>If this parameter is omitted or specified as 0, this is a direct operation
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and the screen is saved immediately. Otherwise, this is an indirect operation
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and the command is stored in the command buffer without an I/O operation taking
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place.</p>
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</dd>
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<dt><strong>Low-level environment handle</strong></dt>
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<dd>INPUT; BINARY(4)
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<p>The low-level environment that the operation applies to. If this parameter
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is omitted or given with a value of zero, the default low-level environment is
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used.</p>
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</dd>
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<dt><strong>Error code</strong></dt>
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<dd>I/O; CHAR(*)
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<p>The structure in which to return error information. For the format of the
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structure, see <a href="../apiref/error.htm#hdrerrcod">Error Code Parameter</a>. If this
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parameter is omitted, diagnostic and escape messages are issued to the
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application.</p>
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</dd>
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</dl>
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<br>
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<h3>Returned Value</h3>
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<dl>
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<dt><strong>Saved data</strong></dt>
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<dd>OUTPUT; BINARY(4)
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<p>For a successful operation, this API returns the value for the saved data
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parameter if this is a direct operation; otherwise, it returns zero. For an
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unsuccessful operation, it returns -1.</p>
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</dd>
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</dl>
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<br>
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<h3>Error Messages</h3>
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<table width="100%" cellpadding="3">
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<!-- cols="15 85" -->
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<tr>
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<th align="left" valign="top">Message ID</th>
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<th align="left" valign="top">Error Message Text</th>
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</tr>
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<tr>
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<td align="left" valign="top">CPF24B4 E</td>
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<td valign="top">Severe error while addressing parameter list.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3CF1 E</td>
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<td valign="top">Error code parameter not valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3CF2 E</td>
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<td valign="top">Error(s) occurred during running of &1 API.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA301 E</td>
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<td valign="top">Command buffer is full.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA303 E</td>
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<td valign="top">Error occurred for screen I/O operation.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA304 E</td>
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<td valign="top">Data-stream error &1 reported for screen I/O
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operation.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA305 E</td>
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<td valign="top">Cannot add operation to command buffer.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA313 E</td>
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<td valign="top">Command buffer already contains an input operation.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA314 E</td>
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<td valign="top">Memory allocation error.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA331 E</td>
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<td valign="top">Buffer handle incorrect.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA334 E</td>
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<td valign="top">Low level environment handle incorrect.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA343 E</td>
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<td valign="top">Output operation not done.</td>
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</tr>
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</table>
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<br>
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<hr>
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API introduced: V2R3
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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"><a href="#Top_Of_Page">Top</a> | <a href=
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"dsm.htm">Dynamic Screen Manager APIs</a> | <a href="aplist.htm">APIs by
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category</a></td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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