# C1.Util.DX.IUnknown.QueryInterface

## Content

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<h1 id="C1_Util_DX_IUnknown_QueryInterface_" data-uid="C1.Util.DX.IUnknown.QueryInterface*">QueryInterface Method
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<a id="C1_Util_DX_IUnknown_QueryInterface_" data-uid="C1.Util.DX.IUnknown.QueryInterface*"></a>
<h4 id="C1_Util_DX_IUnknown_QueryInterface_System_Guid__System_IntPtr__" data-uid="C1.Util.DX.IUnknown.QueryInterface(System.Guid@,System.IntPtr@)">QueryInterface(ref Guid, out IntPtr)</h4>
<div class="markdown level1 summary"><p>Queries the supported COM interface on this instance.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">HResult QueryInterface(ref Guid guid, out IntPtr comObject)</code></pre>
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  <pre><code class="lang-vbnet hljs">Function QueryInterface(ByRef guid As Guid, ByRef comObject As IntPtr) As HResult</code></pre>
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<h5 class="parameters">Parameters</h5>
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      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
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      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.guid">Guid</a></td>
      <td><span class="parametername">guid</span></td>
      <td><p>The guid of the interface.</p>
</td>
    </tr>
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      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.intptr">IntPtr</a></td>
      <td><span class="parametername">comObject</span></td>
      <td><p>The output COM object reference.</p>
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<h5 class="returns">Returns</h5>
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      <th>Type</th>
      <th>Description</th>
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      <td><a class="xref" href="C1.Util.DX.HResult.html">HResult</a></td>
      <td><p>If successfull, <a class="xref" href="C1.Util.DX.HResult.Ok.html">Ok</a></p>
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    </tr>
  </tbody>
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