Automatically Size WPF Frame Object inside TabItem/StackPanel?

TabItem Header="Reports" Name="tReports" Height="50" BorderBrush="Transparent" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="100.

Thanks, that helps. I need to also mention that I have to add another control inside the TabItem control. Once I another control the frame does not fill vertically.

See my original question for the update XAML. – knockando Aug 12 '10 at 15:23.

This worked, the key part being not setting the second RowDefinition Height="Auto" but the first row needs to have it set or the frame only fills about 1/2 of the screen, go figure...

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