# CSJ2K.j2k.codestream.writer.HeaderEncoder.writePOC

## Content

<div class="doc-site-dotnet-api-container">



<h1 id="CSJ2K_j2k_codestream_writer_HeaderEncoder_writePOC_" data-uid="CSJ2K.j2k.codestream.writer.HeaderEncoder.writePOC*">writePOC Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="CSJ2K_j2k_codestream_writer_HeaderEncoder_writePOC_" data-uid="CSJ2K.j2k.codestream.writer.HeaderEncoder.writePOC*"></a>
<h4 id="CSJ2K_j2k_codestream_writer_HeaderEncoder_writePOC_System_Boolean_System_Int32_" data-uid="CSJ2K.j2k.codestream.writer.HeaderEncoder.writePOC(System.Boolean,System.Int32)">writePOC(bool, int)</h4>
<div class="markdown level1 summary"><p>Writes POC marker segment. POC is a functional marker segment
containing the bounds and progression order for any progression order
other than default in the codestream.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">protected virtual void writePOC(bool mh, int tileIdx)</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Protected Overridable Sub writePOC(mh As Boolean, tileIdx As Integer)</code></pre>
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<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
      <td><span class="parametername">mh</span></td>
      <td><p>Flag indicating whether the main header is to be written</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">tileIdx</span></td>
      <td><p>Tile index</p>
</td>
    </tr>
  </tbody>
</table>
</div>