Hello,
you need to bind to the CurrentValue property of the HVLevelIndicator control.
If, for example, you have a property named "TheCurrentValue" in a XAML windows and the HLLevelIndicator is part of that window, then the syntax could look like this:
<Window x:Class="SampleProject.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300"
xmlns:pcp="clr-namespace:AITSW.PCPANEL.WPF;assembly=PCPANEL_WPF_Controls">
<Grid>
<pcp:HVLevelIndicator
Height="38" Margin="21,88,20,0" Name="hVLevelIndicator1" VerticalAlignment="Top"
CurrentValue="{Binding Path=TheCurrentValue, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}"/>
</Grid>
</Window>
Hope that helps
Christian