Setter With Binding to Slider
<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <StackPanel.Resources> <Style TargetType="{x:Type Button}"> <Setter Property="FontSize" Value="{Binding ElementName=scroll, Path=Value}" /> <Setter Property="HorizontalAlignment" Value="Center" /> <Setter Property="Margin" Value="24" /> </Style> </StackPanel.Resources> <ScrollBar Name="scroll" Orientation="Horizontal" Margin="24" Minimum="11" Maximum="100" Value="24" /> <Button> Button Number 1 </Button> </StackPanel>