[k3nnt0ter0]

I found this program and the WPF is embedded to a window. How can I show only the User Control itsel not embedded in a window. .
Here's the code.

using System;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;

namespace SampleWpfUserControlLibrary
{
    /// <summary>
    /// Interaction logic for SampleUserControl.xaml
    /// </summary>
    public partial class SampleUserControl
    {
        private IApplicationHostWindow _hostWindow;
        
        [Obsolete("This constructor should not be used", true)]
        public SampleUserControl()
        {
            InitializeComponent();
        }

        public SampleUserControl(IApplicationHostWindow applicationHostWindow)
        {
            _hostWindow = applicationHostWindow;

            IsHitTestVisible = true;

            InitializeComponent();
        }

        public double GetViewboxWidth()
        {
            return viewHost.ActualWidth;
        }

        public double GetViewboxHeight()
        {
            return viewHost.ActualHeight;
        }

        public void SetViewboxChild(UIElement child)
        {
            viewHost.Content = child;
        }

        public void ProcessLeftButtonDown(Point point)
        {
            var result = VisualTreeHelper.HitTest(this, point);
            return;
        }

        protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters)
        {
            return base.HitTestCore(hitTestParameters) ??
                   new PointHitTestResult(viewHost.Content as Visual ?? viewHost, hitTestParameters.HitPoint);
        }

        private void exitMenuItem_Click(object sender, RoutedEventArgs e)
        {
            _hostwindow.Exit();
        }

        private void newProjectMenuItem_Click(object sender, RoutedEventArgs e)
        {
            _hostwindow.OpenDocument();
        }

        private void UserControl_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            return;
        }

        private void UserControl_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            return;
        }
    }
}

[modi123_1]

A user control requires to be in a form or another control. If you look at the form's properties you can turn off things like the close button, minimize, border, title bar, etc.. but you will still have the form there to display the user control.

[k3nnt0ter0]

Can it be possible for Elementhost to handle a window like this?

[modi123_1]

New plan of attack - how about rearranging your project and see what happens when you try it!

[Skydiver]

The ElementHost is still a control. Like modi123_1 stated above a control needs to be in a form or another control. So you are back to the same basic problem.

It is possible to make a form without any borders or window adornments. This will give the effect that seem to be looking for which is WPF content hosted with WinForms, but without it looking like it is inside a form.