How to do it...

Let's follow these steps to create a WPF composite control and host it inside the Windows Form:

1. First, let's create a WPF User Control Library project. To do this, from Solution Explorer, right-click on the existing solution and select Add | New Project... from the context menu.

2. Select WPF User Control Library (.NET Framework) as the project template, name it as CH11.WpfUserControlLibrary, and click the OK button, as shown in the following screenshot:

3. Once the project gets created by Visual Studio, you will find a user control named UserControl1.xaml, inside the project folder. From Solution Explorer, double-click on it to open it.
4. Divide the default Grid of the UserControl1 into two columns. Set the first column as stretchable to occupy maximum available space and set the second column as Auto:

<Grid.ColumnDefinitions> 
    <ColumnDefinition Width="*"/> 
    <ColumnDefinition Width="Auto"/> 
</Grid.ColumnDefinitions...