SystemFonts.SmallCaptionFontWeightKey Property

System resources expose a number of system metrics as resources to help developers create visuals that are consistent with system settings. SystemFonts is a class that contains both system font values and system font resources that bind to the values—for example, CaptionFontFamily and CaptionFontFamilyKey.

System font metrics can be used as either static or dynamic resources. Use a dynamic resource if you want the font metric to update automatically while the application runs; otherwise use a static resource.

Note
Dynamic resources have the keyword Key appended to the property name.

The following example shows how to access and use system font dynamic resources to style or customize a button. This XAML example creates a button style that assigns SystemFonts values to a button.

<Style x:Key="SimpleFont" TargetType="{x:Type Button}">
    <Setter Property = "FontSize" Value= "{DynamicResource {x:Static SystemFonts.IconFontSizeKey}}"/>
    <Setter Property = "FontWeight" Value= "{DynamicResource {x:Static SystemFonts.MessageFontWeightKey}}"/>
    <Setter Property = "FontFamily" Value= "{DynamicResource {x:Static SystemFonts.CaptionFontFamilyKey}}"/>
</Style>

.NET Framework

.NET Framework Client Profile

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference