I derived from a TextBox and called it MyTextBox. On my LayoutAwarePage I created 2 SolidColorBrush props: MyBackground and MyBorder. In the Xaml of that page I wrote a Reso
<Grid.Resources>
<ResourceDictionary>
<Style TargetType="a:MyTextBox">
<Setter Property="Background" Value="{StaticResource MyBackground}"></Setter>
<Setter Property="BorderBrush" Value="{StaticResource MyBorder}"></Setter>
<Setter Property="Width" Value="200"></Setter>
<Setter Property="IsReadOnly" Value="False"></Setter>
<Setter Property="BorderBrush" Value="3"></Setter>
</Style>
</ResourceDictionary>
</Grid.Resources>
Try this
And inside App.xaml do
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Common/StandardStyles.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
And create a file called standard styles inside your common dir and declare your brushes there (you can actually declare everything there
Binding in Style Setters is not supported in WinRT.