I'm very new to WPF and XAML. I am trying to design a basic data entry form. I have used a stack panel holding four more stack panels to get the layout I want. Perhaps a grid would be better for this, I am not sure.

Here is an image of my form in action: http://yfrog.com/7gscreenshot1impp

And here is the XAML code that generates it:

<Window x:Class="Test1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="224" Width="536.762">
    <StackPanel Height="Auto" Name="stackPanel1" Width="Auto" Orientation="Horizontal">
        <StackPanel Height="Auto" Name="stackPanel2" Width="Auto">
            <Label Height="Auto" Name="label1" Width="Auto">Patient Name:</Label>
            <Label Height="Auto" Name="label2" Width="Auto">Physician:</Label>
            <Label Height="Auto" Name="label3" Width="Auto">Insurance:</Label>
            <Label Height="Auto" Name="label4" Width="Auto">Therapy Goals:</Label>
        </StackPanel>
        <StackPanel Height="Auto" Name="stackPanel3" Width="Auto">
            <TextBox Height="Auto" Name="textBox1" Width="Auto" Padding="3" Margin="1" />
            <TextBox Height="Auto" Name="textBox2" Width="Auto" Padding="3" Margin="1" />
            <TextBox Height="Auto" Name="textBox3" Width="Auto" Padding="3" Margin="1" />
            <TextBox Height="Auto" Name="textBox4" Width="Auto" Padding="3" Margin="1" />
        </StackPanel>
        <StackPanel Height="Auto" Name="stackPanel4" Width="Auto">
            <Label Height="Auto" Name="label5" Width="Auto">Date:</Label>
            <Label Height="Auto" Name="label6" Width="Auto">Patient Phone:</Label>
            <Label Height="Auto" Name="label7" Width="Auto">Facility:</Label>
            <Label Height="Auto" Name="label8" Width="Auto">Referring Physician:</Label>
        </StackPanel>
        <StackPanel Height="Auto" Name="stackPanel5" Width="Auto">
            <TextBox Height="Auto" Name="textBox5" Width="Auto" Padding="3" Margin="1" />
            <TextBox Height="Auto" Name="textBox6" Width="Auto" Padding="3" Margin="1" />
            <TextBox Height="Auto" Name="textBox7" Width="Auto" Padding="3" Margin="1" />
            <TextBox Height="Auto" Name="textBox8" Width="Auto" Padding="3" Margin="1" />
        </StackPanel>
    </StackPanel>
</Window>

What I really want is for the text boxes to stretch equally to fill up the space horizontally. I would also like for the controls in each vertical stackpanel to 'spread out' evenly as the window is resized vertically.

Can any of you experts out there help me out?