Adding contol within other control

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C#

WPF

Hi I am working on small application that would take keyboard key values and simulate keyboard command.

My Idea is to have a main Textbox control and whenever I press keyboard key label with that key name dynamically get added to Textbox, user can enter as many as key he want,

So it would be like Textbox as Parent control and one or more Labels as its children.
I also want cancel button on that label so I guess My label would be custom control so that user can remove that whenever entered wrong key.

My could be like

private void KeyDown(object sender, KeyEventArgs e)
        {

            //txtname.Text = e.Key.ToString();

            Label lblfocus = new Label();
            lblfocus = TextFocusedFirst();
            lblfocus.Text = e.Key.ToString();

        }

now lblfocus would be added dynamically to my Parent control Textbox.

Thanks In advance