title: What's the meaning of * (asterisk) in XAML ColumnDefinition?
body: <p>What is the meaning of * (asterisk) in the XAML below?</p>
  
  <pre><code>&lt;ColumnDefinition Width="0.07*"/&gt;
  &lt;Grid Height="100" HorizontalAlignment="Left" 
        Margin="102,134,0,0" 
        Name="grid1" VerticalAlignment="Top" 
        Width="354"&gt;
      &lt;Grid.ColumnDefinitions&gt;
          &lt;ColumnDefinition Width="40*" /&gt;
          &lt;ColumnDefinition Width="314*" /&gt;
      &lt;/Grid.ColumnDefinitions&gt;
  &lt;/Grid&gt;
  </code></pre>