# GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler

## Content

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  <h1 id="GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler" data-uid="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler" class="text-break">DesignerTabChangedEventHandler Delegate
</h1>
  <div class="markdown level0 summary"><p>Represents the method that handles the <a class="xref" href="GrapeCity.ActiveReports.Design.DesignerTabChangedEventArgs.html">DesignerTabChangedEventArgs</a> event, which occurs when the active tab in the designer changes.</p>
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  <div class="markdown level0 conceptual"></div>
  <h6><strong>Namespace</strong>: <a class="xref" href="GrapeCity.ActiveReports.Design.html">GrapeCity.ActiveReports.Design</a></h6>
  <h6><strong>Assembly</strong>: MESCIUS.ActiveReports.Design.Win.dll</h6>
  <h5 id="GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public delegate void DesignerTabChangedEventHandler(object sender, DesignerTabChangedEventArgs e)</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.object">object</a></td>
        <td><span class="parametername">sender</span></td>
        <td><p>The source of the event, typically the designer surface or control that the tab change occurred in.</p>
</td>
      </tr>
      <tr>
        <td><a class="xref" href="GrapeCity.ActiveReports.Design.DesignerTabChangedEventArgs.html">DesignerTabChangedEventArgs</a></td>
        <td><span class="parametername">e</span></td>
        <td><p>A <a class="xref" href="GrapeCity.ActiveReports.Design.DesignerTabChangedEventArgs.html">DesignerTabChangedEventArgs</a> instance containing the event data, including the newly activated tab.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 id="GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler_remarks"><strong>Remarks</strong></h5>
  <div class="markdown level0 remarks"><p>This delegate is used in conjunction with the <a class="xref" href="GrapeCity.ActiveReports.Design.DesignerTabChangedEventArgs.html">DesignerTabChangedEventArgs</a> event to provide a way for applications to respond to changes in the
active tab within the designer interface. When the active tab changes, the event is raised, and any registered handlers are invoked.</p>
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  <h3 id="constructors">Constructors
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
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        <td id="GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler__ctor_System_Object_System_IntPtr_" data-uid="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler.#ctor(System.Object,System.IntPtr)">
          <a class="xref" href="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler.-ctor.html#GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler__ctor_System_Object_System_IntPtr_">DesignerTabChangedEventHandler(object, IntPtr)</a>
        </td>
        <td class="markdown level1 summary"></td>
      </tr>
    </tbody>
  </table>
  <h3 id="methods">Methods
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler_BeginInvoke_System_Object_GrapeCity_ActiveReports_Design_DesignerTabChangedEventArgs_System_AsyncCallback_System_Object_" data-uid="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler.BeginInvoke(System.Object,GrapeCity.ActiveReports.Design.DesignerTabChangedEventArgs,System.AsyncCallback,System.Object)">
          <a class="xref" href="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler.BeginInvoke.html#GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler_BeginInvoke_System_Object_GrapeCity_ActiveReports_Design_DesignerTabChangedEventArgs_System_AsyncCallback_System_Object_">BeginInvoke(object, DesignerTabChangedEventArgs, AsyncCallback, object)</a>
        </td>
        <td class="markdown level1 summary"></td>
      </tr>
      <tr>
        <td id="GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler_EndInvoke_System_IAsyncResult_" data-uid="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler.EndInvoke(System.IAsyncResult)">
          <a class="xref" href="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler.EndInvoke.html#GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler_EndInvoke_System_IAsyncResult_">EndInvoke(IAsyncResult)</a>
        </td>
        <td class="markdown level1 summary"></td>
      </tr>
      <tr>
        <td id="GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler_Invoke_System_Object_GrapeCity_ActiveReports_Design_DesignerTabChangedEventArgs_" data-uid="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler.Invoke(System.Object,GrapeCity.ActiveReports.Design.DesignerTabChangedEventArgs)">
          <a class="xref" href="GrapeCity.ActiveReports.Design.DesignerTabChangedEventHandler.Invoke.html#GrapeCity_ActiveReports_Design_DesignerTabChangedEventHandler_Invoke_System_Object_GrapeCity_ActiveReports_Design_DesignerTabChangedEventArgs_">Invoke(object, DesignerTabChangedEventArgs)</a>
        </td>
        <td class="markdown level1 summary"></td>
      </tr>
    </tbody>
  </table>

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