Put a StackPanel on the Left
<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Fun with Panels!" Height="291" Width="529"> <DockPanel LastChildFill ="True"> <Menu DockPanel.Dock ="Top" HorizontalAlignment="Left" Background="White"> <MenuItem Header="_File"> <Separator/> <MenuItem Header ="_Exit" /> </MenuItem> </Menu> <StatusBar Name="statBar" DockPanel.Dock ="Bottom" VerticalAlignment="Bottom" Background="Beige" > <StatusBarItem> <TextBlock>Ready</TextBlock> </StatusBarItem> </StatusBar> <StackPanel Background="LightSteelBlue" Orientation ="Vertical" DockPanel.Dock ="Left"> <Label Name="lblInstruction" FontSize="15">Information</Label> <Label Name="lblMake">Make</Label> <TextBox Name="txtMake"/> <Label Name="lblColor">Color</Label> <TextBox Name="txtColor"/> <Label Name="lblPetName">Name</Label> <TextBox Name="txtPetName"/> <Button Name="btnOK">OK</Button> </StackPanel> <TextBlock Background ="LemonChiffon" FontSize ="20">test</TextBlock> </DockPanel> </Window>