64 lines
3.7 KiB
HTML
64 lines
3.7 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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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="(C) Copyright IBM Corporation 2005" />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="IA4HierarchyFolder::Activate" />
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<meta name="DC.Relation" scheme="URI" content="rzakxia4hierarchyifspec.htm" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>IA4HierarchyFolder::Activate</title>
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</head>
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<body id="rzakxia4hfactivate"><a name="rzakxia4hfactivate"><!-- --></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">IA4HierarchyFolder::Activate</h1>
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<div><p><strong>Purpose</strong></p>
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<p>Places the IA4HierarchyFolder instance in an activated state. This function
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also performs any processing that is needed to prepare a folder for enumeration,
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including calling the iSeries™ server to prime the cache of folder objects
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on the client. The function is called from a data thread so that long running
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operations will not degrade the performance of the user interface. This is
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a required member function.</p>
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<p><strong>Syntax</strong> </p>
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<pre>HRESULT STDMETHODCALLTYPE Activate();</pre>
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<p><strong>Parameters</strong></p>
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<p>None.</p>
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<p><strong>Return Codes</strong></p>
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<p>Returns NOERROR if successful or E_FAIL if unable to obtain the contents
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of the folder.</p>
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<p><strong>Comments</strong></p>
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<p>The iSeries Navigator
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calls this function the first time a user selects or expands a folder. It
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is called again, after a call to Close, when the user has requested a refresh
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of the folder contents.</p>
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<p>The function may be called at other times whenever a pointer to the folder
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interface needs to be reestablished. An example would be when the user selects
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a folder a second time. After selecting another folder, the function should
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simply return TRUE if the associated processing has already been performed.</p>
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<p>For extremely large lists, you may choose to return from Activate before
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the list is completely constructed, after having first created a worker thread
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to continue building the list. If this is the case, make sure that your implementation
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of GetListSize returns the correct indication of whether the list is completely
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constructed.</p>
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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="rzakxia4hierarchyifspec.htm" title="An item identifier, or data entity, identifies all folders and objects in the Windows namespace. Item identifiers are like filenames in a hierarchical file system. The Windows namespace is, in fact, a hierarchical namespace with its root at the Desktop.">IA4HierarchyFolder interface specifications listing</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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