Grid With Splitter
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="FunWithPanels" Height="191" Width="436"> <Grid Background ="AliceBlue"> <Grid.ColumnDefinitions> <ColumnDefinition Width ="Auto"/> <ColumnDefinition/> </Grid.ColumnDefinitions> <Label Name="lblLeft" Background ="GreenYellow" Grid.Column="0" Content ="Left!"/> <GridSplitter Grid.Column ="0" Width ="5"/> <Label Name="lblRight" Grid.Column ="1" Content ="Right!"/> </Grid> </Window>