66 lines
3.4 KiB
HTML
66 lines
3.4 KiB
HTML
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<meta name="DC.Title" content="cwbDQ_GetKey" />
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<title>cwbDQ_GetKey</title>
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</head>
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<body id="cwbdq_getkey"><a name="cwbdq_getkey"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1"><span class="apiname">cwbDQ_GetKey</span></h1>
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<div><div class="section"><h4 class="sectiontitle">Purpose</h4><p>Get the key attribute of the data object,
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previously set by the <span class="apiname">cwbDQ_SetKey</span> API. This is the key
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that is used for writing data to a keyed data queue. Along with the search
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order, this key is also used to read data from a keyed data queue. The key
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that is associated with the record retrieved can be obtained by calling the <span class="apiname">cwbDQ_GetRetKey</span> API.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Syntax</h4><pre>
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unsigned int CWB_ENTRY cwbDQ_GetKey(
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cwbDQ_Data data,
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unsigned char *key);</pre>
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</div>
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<div class="section"><h4 class="sectiontitle">Parameters</h4><dl><dt class="dlterm">cwbDQ_Data data - input</dt>
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<dd>Handle of the data object that was returned by a previous call to <span class="apiname">cwbDQ_CreateData</span>.</dd>
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<dt class="dlterm">unsigned char * key - output</dt>
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<dd>Pointer to the key. The key may contain embedded NULLS, so it is not an
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ASCIIZ string.</dd>
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</dl>
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</div>
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<div class="section"><h4 class="sectiontitle">Return Codes</h4><p>The following list shows common return
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values.</p>
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<dl><dt class="dlterm">CWB_OK</dt>
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<dd>Successful completion.</dd>
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<dt class="dlterm">CWB_INVALID_POINTER</dt>
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<dd>Bad or null pointer.</dd>
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<dt class="dlterm">CWBDQ_INVALID_DATA_HANDLE</dt>
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<dd>Invalid data handle.</dd>
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</dl>
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</div>
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<div class="section"><h4 class="sectiontitle">Usage</h4><p>None</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaikdqapilist4.htm" title="Use these APIs for writing to and reading from a data queue">Data Queues: Read and write APIs</a></div>
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</div>
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</div>
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</body>
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</html>
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