WPF Window

Question

Is it possible to insert a child window in WPF like on Windows form ?, as you can see in the attached image.
Or to better explain a window within another window

The image below is Windows Form

WIndows Form code

        private void activeToolStripMenuItem_Click(object sender, EventArgs e)  
        {  
            this.IsMdiContainer = true;  
  
            Form ActiveEvents = new EventOpenList();  
            ActiveEvents.MdiParent = this;  
            ActiveEvents.Show();  
            ActiveEvents.BringToFront();  
        }  

Answer 1

A window in WPF is always top-level. So there's no exact equivalent of WinForms MDI or WinForms non-top-level forms as a built-in feature in WPF.

Instead, you can create a UserControl and add it to the window programmatically. For example, assuming you have a control called UserControl1 and a TabControl having tabControl1 as its name, then you can handle click event of a button and add an instance of the UserControl1 as content of the tab item:

var page = new UserControl1();  
var tabItem = (TabItem)tabControl1.Items[0];  
tabItem.Content = page;  

Alternatively, you may want to use AvalonDock or one of its forks.