# C1.Util.DX.Storage.ComStream.LockRegion

## Content

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



<h1 id="C1_Util_DX_Storage_ComStream_LockRegion_" data-uid="C1.Util.DX.Storage.ComStream.LockRegion*">LockRegion Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_Util_DX_Storage_ComStream_LockRegion_" data-uid="C1.Util.DX.Storage.ComStream.LockRegion*"></a>
<h4 id="C1_Util_DX_Storage_ComStream_LockRegion_System_Int64_System_Int64_C1_Util_DX_Storage_LockType_" data-uid="C1.Util.DX.Storage.ComStream.LockRegion(System.Int64,System.Int64,C1.Util.DX.Storage.LockType)">LockRegion(long, long, LockType)</h4>
<div class="markdown level1 summary"><p>HRESULT IStream::LockRegion([In] ULARGE_INTEGER libOffset,[In] ULARGE_INTEGER cb,[In] LOCKTYPE dwLockType)</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public void LockRegion(long libOffset, long cb, LockType dwLockType)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Sub LockRegion(libOffset As Long, cb As Long, dwLockType As LockType)</code></pre>
</div>
<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.int64">long</a></td>
      <td><span class="parametername">libOffset</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int64">long</a></td>
      <td><span class="parametername">cb</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="C1.Util.DX.Storage.LockType.html">LockType</a></td>
      <td><span class="parametername">dwLockType</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="implements">Implements</h5>
    <div><a class="xref" href="C1.Util.DX.Storage.IStream.LockRegion.html#C1_Util_DX_Storage_IStream_LockRegion_System_Int64_System_Int64_C1_Util_DX_Storage_LockType_">IStream.LockRegion(long, long, LockType)</a></div>
</div>