<ScrollBar Name="hscroll" Maximum="100" Minimum="1" SmallChange="1" LargeChange="10" Orientation="Vertical"></ScrollBar>
<Label x:Name="txtblockContent" Background="Red" HorizontalAlignment="Left" DataContext="{Binding ElementName=hscroll, Mode=OneWay}"
Content="{Binding Path=Value}" />
You can use this...