# GrapeCity.Documents.Imaging.GcBitmap.ApplyTransparencyMask

## Content

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



<h1 id="GrapeCity_Documents_Imaging_GcBitmap_ApplyTransparencyMask_" data-uid="GrapeCity.Documents.Imaging.GcBitmap.ApplyTransparencyMask*">ApplyTransparencyMask Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="GrapeCity_Documents_Imaging_GcBitmap_ApplyTransparencyMask_" data-uid="GrapeCity.Documents.Imaging.GcBitmap.ApplyTransparencyMask*"></a>
<h4 id="GrapeCity_Documents_Imaging_GcBitmap_ApplyTransparencyMask_GrapeCity_Documents_Imaging_BilevelBitmap_System_Nullable_System_Drawing_Rectangle__" data-uid="GrapeCity.Documents.Imaging.GcBitmap.ApplyTransparencyMask(GrapeCity.Documents.Imaging.BilevelBitmap,System.Nullable{System.Drawing.Rectangle})">ApplyTransparencyMask(BilevelBitmap, Rectangle?)</h4>
<div class="markdown level1 summary"><p>Applies a transparency mask to the current image or its portion.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public void ApplyTransparencyMask(BilevelBitmap transparencyMask, Rectangle? clipRect = null)</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Sub ApplyTransparencyMask(transparencyMask As BilevelBitmap, Optional clipRect As Rectangle? = Nothing)</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="GrapeCity.Documents.Imaging.BilevelBitmap.html">BilevelBitmap</a></td>
      <td><span class="parametername">transparencyMask</span></td>
      <td><p>A <a class="xref" href="GrapeCity.Documents.Imaging.BilevelBitmap.html">BilevelBitmap</a> with the transparency mask.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.drawing.rectangle">Rectangle</a>?</td>
      <td><span class="parametername">clipRect</span></td>
      <td><p>The target rectangle of the <a class="xref" href="GrapeCity.Documents.Imaging.GcBitmap.html">GcBitmap</a>.</p>
</td>
    </tr>
  </tbody>
</table>


<a id="GrapeCity_Documents_Imaging_GcBitmap_ApplyTransparencyMask_" data-uid="GrapeCity.Documents.Imaging.GcBitmap.ApplyTransparencyMask*"></a>
<h4 id="GrapeCity_Documents_Imaging_GcBitmap_ApplyTransparencyMask_GrapeCity_Documents_Imaging_GrayscaleBitmap_System_Nullable_System_Drawing_Rectangle__" data-uid="GrapeCity.Documents.Imaging.GcBitmap.ApplyTransparencyMask(GrapeCity.Documents.Imaging.GrayscaleBitmap,System.Nullable{System.Drawing.Rectangle})">ApplyTransparencyMask(GrayscaleBitmap, Rectangle?)</h4>
<div class="markdown level1 summary"><p>Applies a transparency mask to the current image or its portion.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public void ApplyTransparencyMask(GrayscaleBitmap transparencyMask, Rectangle? clipRect = null)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Sub ApplyTransparencyMask(transparencyMask As GrayscaleBitmap, Optional clipRect As Rectangle? = Nothing)</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="GrapeCity.Documents.Imaging.GrayscaleBitmap.html">GrayscaleBitmap</a></td>
      <td><span class="parametername">transparencyMask</span></td>
      <td><p>A <a class="xref" href="GrapeCity.Documents.Imaging.GrayscaleBitmap.html">GrayscaleBitmap</a> with the transparency mask.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.drawing.rectangle">Rectangle</a>?</td>
      <td><span class="parametername">clipRect</span></td>
      <td><p>The target rectangle of the <a class="xref" href="GrapeCity.Documents.Imaging.GcBitmap.html">GcBitmap</a>.</p>
</td>
    </tr>
  </tbody>
</table>
</div>