Asp .Net: Create a Simple 'Web User Control'

<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="NewUserControl.ascx.vb" Inherits="MyProjectsWebApplication.NewUserControl" %>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

Public Class NewUserControl
    Inherits System.Web.UI.UserControl

    Public Property Caption() As String
        Get
            Return Me.Label1.Text
        End Get
        Set(ByVal value As String)
            Me.Label1.Text = value
        End Set
    End Property

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    End Sub

End Class

<%@ Register TagPrefix="UC" TagName="NewUserControl" Src="~/NewUserControl.ascx"  %>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
  <UC:NewUserControl runat="server" Caption="My First Web User Control" />
</asp:Content>