using System.Diagnostics; namespace HostingAppTest { public class LoadingChildExample { public void LoadChild() { var procInfo = new ProcessStartInfo("calc.exe"); var childProc = new Process(procInfo); childProc.Start(); var hostedChild = new HwndHostEx(childProc.MainWindowHandle); // Any FrameworkElement that inherits from System.Windows.Controls.Decorator can host the child. // No need to use WindowsFormsHost! decoratorControl.Child = hostedChild; } } }