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    <p>Your <code>Button</code> will automatically stretch to fit the size of it's contents, so get rid of it's <code>Height</code> and <code>Width</code> properties. If you want to maintain the space between the edge of the Button and the ContentControl, use the ContentControl's <code>Margin</code> property.</p> <p>Then, use a <code>DataTrigger</code> in your ContentControl's <code>Style</code> to change the <code>Height</code>/<code>Width</code> when the mouse is over it. Be sure you set <code>Height</code>/<code>Width</code> in your style instead of in your <code>&lt;ContentControl&gt;</code> tag, because if you set it in the tag it will take precedence over the triggered value so will never change.</p> <pre><code>&lt;Style x:Key="MyContentControlStyle" TargetType="{x:Type ContentControl}"&gt; &lt;Setter Property="Height" Value="20" /&gt; &lt;Setter Property="Width" Value="20" /&gt; &lt;Setter Property="Margin" Value="5" /&gt; &lt;Setter Property="Content" Value="ContentControl" /&gt; &lt;Setter Property="Template" Value="{DynamicResource contentTemplate}" /&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding ElementName=btnAddItem, Path=IsMouseOver}" Value="True"&gt; &lt;Setter Property="Height" Value="20" /&gt; &lt;Setter Property="Width" Value="20" /&gt; &lt;/DataTrigger &gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;Button x:Name="btnAddItem" Height="25" Width="25" Margin="5,0,0,0" Style="{DynamicResource btnStyle}" ToolTip="Add Item"&gt; &lt;ContentControl Style="{StaticResource MyContentControlStyle}" /&gt; &lt;/Button&gt; </code></pre>
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    1. COThanks for the beautiful advice. I used your code example to set both the Template and Style for the button seperately as I am using different vector images for the buttons, so can not set the template property in style. And I liked the idea to use margins for the contentcontrol. It worked beautifully. But the issue I faced was that the vector image I used does not fill up all the space but is hollow like a circle. So, it works only when I hover over the part of the image. When I am inside the hollow part, it stops working.
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      1. USShakti Prakash Singh
    2. CO@ShaktiSingh Base your Trigger off of the Button's `IsMouseOver` property using a `DataTrigger` instead. I'll update my code.
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