# C1.Blazor.Ribbon.C1ToggleButtonTool.IsCheckedChanged

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<h1 id="C1_Blazor_Ribbon_C1ToggleButtonTool_IsCheckedChanged_" data-uid="C1.Blazor.Ribbon.C1ToggleButtonTool.IsCheckedChanged*">IsCheckedChanged Property
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<a id="C1_Blazor_Ribbon_C1ToggleButtonTool_IsCheckedChanged_" data-uid="C1.Blazor.Ribbon.C1ToggleButtonTool.IsCheckedChanged*"></a>
<h4 id="C1_Blazor_Ribbon_C1ToggleButtonTool_IsCheckedChanged" data-uid="C1.Blazor.Ribbon.C1ToggleButtonTool.IsCheckedChanged">IsCheckedChanged</h4>
<div class="markdown level1 summary"><p>Gets or sets the callback called when the <a class="xref" href="C1.Blazor.Ribbon.C1ToggleButtonTool.IsChecked.html#C1_Blazor_Ribbon_C1ToggleButtonTool_IsChecked">IsChecked</a> property has changed.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">[Parameter]
public EventCallback&lt;bool?&gt; IsCheckedChanged { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">&lt;Parameter&gt;
Public Property IsCheckedChanged As EventCallback(Of Boolean?)</code></pre>
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