title: how to call wpf user control from winform
body: <p>I have a winform 'form1' and a wpf usercontrol 'wpfuser1'</p>
  
  <p>I set 'wpf user1' as a splash screen with progress bar</p>
  
  <p>in form1 I would like to call that splash screen to indicate the form is loading.</p>
  
  <p>How can I do that in form1?</p>
  
  <pre><code>public Form1()
      {
          this.Hide();
  
          UserControl1 wpfuser1 = new UserControl1();
  
          //wpfuser1.show() ?????
  
          Thread.Sleep(5000);
  
          this.Visible = true;
  
          InitializeComponent();
      }
  </code></pre>