# C1.Win.Map.IMapVirtualSource.Request

## Content

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<h1 id="C1_Win_Map_IMapVirtualSource_Request_" data-uid="C1.Win.Map.IMapVirtualSource.Request*">Request Method
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<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_Win_Map_IMapVirtualSource_Request_" data-uid="C1.Win.Map.IMapVirtualSource.Request*"></a>
<h4 id="C1_Win_Map_IMapVirtualSource_Request_System_Double_System_Double_C1_Win_Interop_Point_C1_Win_Interop_Point_" data-uid="C1.Win.Map.IMapVirtualSource.Request(System.Double,System.Double,C1.Win.Interop.Point,C1.Win.Interop.Point)">Request(double, double, Point, Point)</h4>
<div class="markdown level1 summary"><p>Called from <a class="xref" href="C1.Win.Map.VirtualLayer.html">VirtualLayer</a> when new items are needed for a map region.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">IEnumerable&lt;VectorItem&gt; Request(double minZoom, double maxZoom, Point lowerLeft, Point upperRight)</code></pre>
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  <pre><code class="lang-vbnet hljs">Function Request(minZoom As Double, maxZoom As Double, lowerLeft As Point, upperRight As Point) As IEnumerable(Of VectorItem)</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.double">double</a></td>
      <td><span class="parametername">minZoom</span></td>
      <td><p>The minimum zoom of the region.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></td>
      <td><span class="parametername">maxZoom</span></td>
      <td><p>The maximum zoom of the region.</p>
</td>
    </tr>
    <tr>
      <td><span class="xref">Point</span></td>
      <td><span class="parametername">lowerLeft</span></td>
      <td><p>The lower left coordinate of the region, in geographic coordinates.</p>
</td>
    </tr>
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      <td><span class="xref">Point</span></td>
      <td><span class="parametername">upperRight</span></td>
      <td><p>The upper right coordinate of the region, in geographic coordinates.</p>
</td>
    </tr>
  </tbody>
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<h5 class="returns">Returns</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
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    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;<a class="xref" href="C1.Win.Map.VectorItem.html">VectorItem</a>&gt;</td>
      <td><p>The items in the region.</p>
</td>
    </tr>
  </tbody>
</table>
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