Well.. I found that I was able to accomplish what I wanted with a Grid. I had started with a Grid before I tried DockPanel, but couldn't get it to work right. It tried again and got it. Kot sure what I missed the first time. Probably did too much hard-coding! <g>

I find it hard to choose the right layout structure. It can get quite complex: StackPanels in Grids in DockPanels in Grids can be a little hard to keep track of!

        <Grid Grid.Row="1" Grid.Column="1" Margin="0,0,5,0">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="3*"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="1*"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <...>
         </Grid>

>How can I propertionally set the height of the child elements inside of my DockPanel?
>
>I want it so that when I re-size my form, it will proportionally make the (3) ListViews in the dockpanel taller or shorter as necessary.