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SystemColors.ActiveCaptionColorKey Property

Gets the ResourceKey for the background Color of the active window's title bar.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

static member ActiveCaptionColorKey : ResourceKey with get
<object property="{DynamicResource {x:Static SystemColors.ActiveCaptionColorKey}}"/>

XAML Values

x:Static

The x:Static Markup Extension.

Property Value

Type: System.Windows.ResourceKey
The resource key for the background Color of the active window's title bar.

Use the ActiveCaptionColorKey to create a dynamic reference to the active caption system color. This dynamic reference will automatically update if the color is changed. To create a static reference that does not update automatically, use ActiveCaptionColor.

To use a system color in a gradient, you use the <SystemColor>Color and <SystemColor>ColorKey static properties of the SystemColors class to obtain a reference to the color, where <SystemColor> is the name of the desired system color. Use the <SystemColor>ColorKey properties when you want to create a dynamic reference that updates automatically as the system theme changes. Otherwise, use the <SystemColor>Color properties.

The following example uses dynamic system color resources to create a gradient.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  WindowTitle="Dynamic System Colors Example" Background="White">  
  <StackPanel Margin="20">

    <!-- Uses dynamic references to system colors to set
         the colors of gradient stops. 
         If these system colors change while this application
         is running, the gradient will be updated
         automatically.  -->
    <Button Content="Hello, World!">
      <Button.Background>
        <LinearGradientBrush>
          <LinearGradientBrush.GradientStops>
            <GradientStop Offset="0.0" 
              Color="{DynamicResource {x:Static SystemColors.DesktopColorKey}}" />
            <GradientStop Offset="1.0" 
              Color="{DynamicResource {x:Static SystemColors.ControlLightLightColorKey}}" />
          </LinearGradientBrush.GradientStops>
        </LinearGradientBrush>
      </Button.Background>
    </Button>

  </StackPanel>
</Page>

The next example uses static system color resources to create a gradient.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  WindowTitle="Static System Colors Example" Background="White">  
  <StackPanel Margin="20">

    <!-- Uses static references to system colors to set
         the colors of gradient stops. 
         If these system colors change while this application
         is running, this button will not be updated until
         the page is loaded again. -->
    <Button Content="Hello, World!">
      <Button.Background>
        <LinearGradientBrush>
          <LinearGradientBrush.GradientStops>
            <GradientStop Offset="0.0" 
              Color="{x:Static SystemColors.DesktopColor}" />
            <GradientStop Offset="1.0" 
              Color="{x:Static SystemColors.ControlLightLightColor}" />
          </LinearGradientBrush.GradientStops>
        </LinearGradientBrush>
      </Button.Background>
    </Button>

  </StackPanel>
</Page>

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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