Question

Is it possible to get controls to automatically divide a space in thirds as the window resizes? It is easy enough to do in code, but I’d like to set the parameters directly in the xaml if possible.

Answer 1

Use the Grid control. It takes up whatever space is available. You can get thirds by doing (assuming you want three columns)

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinitions Width="*"/>
        <ColumnDefinitions Width="*"/>
        <ColumnDefinitions Width="*"/>
    </Grid.ColumnDefinitions>
    <Button Grid.Column="0"/>
    <Button Grid.Column="1"/>
    <Button Grid.Column="2"/>
</Grid>