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<h1 class="topictitle1">System object attributes</h1>
<div><p><strong>System object attributes</strong> affect the behavior of signing
on and communicating with the iSeries™ system that the system object
represents.</p>
<div class="section"><p>Most attributes can be changed until a successful signon has occurred
(either as the result of a successful call to <a href="rzaikcwbcosignon.htm#cwbco_signon">cwbCO_Signon</a> or
to <a href="rzaikcwbcoconnect.htm#cwbco_connect">cwbCO_Connect</a>). After the signon
has taken place successfully, calling the API that tries to change the value
of such an attribute will fail with return code CWB_INV_AFTER_SIGNON. The
only two attributes that can be changed after a successful signon are the
Window Handle and Connect Timeout.</p>
</div>
<div class="section"><p>Some values and the ability to change them may be controlled via <strong>policies</strong>.
Policies are controls that a systems administrator can set up to mandate default
attribute values, and to prohibit changes to attributes. The default values
that are specified in the <strong>System object attributes list</strong> topic (link
below) are used under the following conditions: </p>
<ul><li>If policies do not specify or suggest different values</li>
<li>If a value for such an attribute has not been configured explicitly for
the iSeries system
in the system list</li>
</ul>
<p>If an attribute's default value may be set by policy, this also is
noted. If changing an attribute's value can be prohibited by policy, then: </p>
<ul><li>An API is provided to check for the attribute's modifiability.</li>
<li>A specific return code is provided by the attribute's set method if the
set fails because of such a policy.</li>
</ul>
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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="rzaiksyapisysobjattrlist.htm">System object attributes list</a></strong><br />
Following is a list of system object attributes. It includes descriptions, requirements, and considerations.</li>
</ul>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaikappncm.htm" title="The iSeries Access for Windows Communications and Security topic shows you how to use iSeries Access for Windows application programming interfaces (APIs)">iSeries Access for Windows Communications and Security APIs</a></div>
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