286 lines
7.4 KiB
HTML
286 lines
7.4 KiB
HTML
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<!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>Clear Screen (QsnClrScr) 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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<!-- 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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<!-- 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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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!--File Edited October 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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<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>Clear Screen (QsnClrScr) API</h2>
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<div class="box" style="width: 60%;">
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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%">Mode</td>
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<td align="left" valign="top" width="20%">Input</td>
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<td align="left" valign="top" width="20%">Char(1)</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%">Return code</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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<!-- iddvc RMBR -->
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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 Clear Screen (QsnClrScr) API clears the screen and sets the screen size
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to the specified mode. This command corresponds directly to the 5250 Clear Unit
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or Clear Unit Alternate command, depending upon the current screen presentation
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size. See the 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>If this is an indirect operation, it must be the first command in the
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command buffer.</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>Mode</strong></dt>
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<dd>INPUT; CHAR(1)
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<p>The mode to place the screen in after the screen is cleared. If this
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parameter is omitted, a value of 0 is assumed.</p>
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<p>The possible values are:</p>
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<table cellpadding="3">
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<!-- cols="5 95" -->
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<tr>
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<td valign="top"><em>0</em></td>
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<td valign="top">Indicates that the current screen size should be kept. For
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indirect operations where this value is specified, the subsequent clear
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operation will be based on the current screen size, not on whatever size the
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screen is when the command buffer is ultimately written out. The current
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display size will be determined using the QsnRtvMod interface.</td>
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</tr>
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<tr>
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<td valign="top"><em>3</em></td>
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<td valign="top">Set screen to 24x80 mode.</td>
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</tr>
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<tr>
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<td valign="top"><em>4</em></td>
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<td valign="top">Set screen to 27x132 mode. This value is not supported by all
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devices. A CPFA306 error will occur if an attempt is made to specify this value
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with a device that does not support it.</td>
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</tr>
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</table>
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<br>
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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 cleared 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>Return code</dt>
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<dd>OUTPUT; BINARY(4)
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<p>A return code indicating the result of the operation. The value returned
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will be 0 if the operation was successful, or -1 otherwise.</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">CPFA306 E</td>
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<td valign="top">Command not supported by current device.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA321 E</td>
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<td valign="top">Operation not first command in command buffer.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA322 E</td>
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<td valign="top">Incorrect display mode &1 specified.</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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<tr>
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<td align="left" valign="top">CPFA344 E</td>
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<td valign="top">The file &2 in library &3 is not valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA345 E</td>
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<td valign="top">The invite active flag is not valid.</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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