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    <p>I would use the Effect property of whatever the client area you wish to gray scale. You will however need to create your own pixel shader to do the gray scale conversion.</p> <p><a href="http://windowsclient.net/wpf/wpf35/wpf-35sp1-more-effects.aspx" rel="nofollow noreferrer">http://windowsclient.net/wpf/wpf35/wpf-35sp1-more-effects.aspx</a></p> <p>You could quickly test your concept by using the BlurEffect class instead of a custom shader. </p> <pre><code>&lt;Window x:Class="WpfGrayscaleSample.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="327" Width="526"&gt; &lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition Height="239*" /&gt; &lt;RowDefinition Height="50*" /&gt; &lt;/Grid.RowDefinitions&gt; &lt;Canvas Name="clientArea" Background="Transparent" Grid.Row="0"&gt; &lt;!-- Just some controls --&gt; &lt;Button Height="31" Name="button1" Width="80" Canvas.Left="30" Canvas.Top="125"&gt;Button&lt;/Button&gt; &lt;Button Height="28" Name="button2" VerticalAlignment="Bottom" Click="button2_Click" HorizontalAlignment="Right" Width="75" Margin="0,0,16,34" Canvas.Left="66" Canvas.Top="54"&gt;Button&lt;/Button&gt; &lt;Rectangle Margin="86,43,0,0" Name="rectangle1" Stroke="Black" Fill="Crimson" Height="59" HorizontalAlignment="Left" VerticalAlignment="Top" Width="109" Canvas.Left="145" Canvas.Top="44" /&gt; &lt;/Canvas&gt; &lt;!-- Button to activate the shader effect --&gt; &lt;Button Height="23" Margin="15,0,0,21" Name="button3" VerticalAlignment="Bottom" HorizontalAlignment="Left" Width="75" Grid.Row="1" Click="button3_Click"&gt;Button&lt;/Button&gt; &lt;/Grid&gt; </code></pre> <p></p> <p>And the event handler for button3 would simply be</p> <pre><code> private void button3_Click(object sender, RoutedEventArgs e) { clientArea.Effect = new BlurEffect() { Radius = 10.0 }; } </code></pre> <p>Of course it is a bit more work to hook up the custom shader for the gray scaling, but the added bonus of the pixel shader is going to be performance.</p>
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    1. USAndrew Bienert
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    1. COthis is what i was looking for. thou' your blur effect as well micahtan's idea of changing the zorder are really worth considering. thanks a lot
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      1. USsudarsanyes
 

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