How can the properties of constituent controls in a VB Windows Forms UserControl be made available for use in ApplicationSettings?

I created a UserControl with a Textbox. I would like to make TextBox1.Text available for use with My.Settings via ApplicationSettings, but it does not appear in the list. I also created a property to wrap it, but that also does not appear in the list.

How do I do this?

In example and screenshot below, neither ‘TextBox11’ nor the user-defined property ‘UserControlText’ are found in the Application Settings list.

Imports System.ComponentModel    
Public Class UserControl1    
    <DesignerSerializationVisibility(DesignerSerializationVisibility.Content)>
    Public Property UserControlText() As String
        Get
            Return TextBox1.Text
        End Get
        Set(value As String)
            TextBox1.Text = value
        End Set
    End Property    
End Class