Mobile Control ASP.Net

<%@ Page 
    Inherits="System.Web.UI.MobileControls.MobilePage" 
    Language="VB" 
%>
<%@ Register 
    TagPrefix="mobile" 
    Namespace="System.Web.UI.MobileControls" 
    Assembly="System.Web.Mobile" 
%>

            runat="server"
        id="lblTitle"
        StyleReference="title" 
        Text="TextBox Test Page"
    />
            runat="server"
        id="lbl1"
        Text="Enter Some Text"
    />
            runat="server"
        id="txt1"
        MaxLength=20        
    />
            runat="server"
        id="lbl2"
        Text="Enter a Number"
    />
            runat="server"
        id="txt2"
        MaxLength=20        
        Numeric=True
    />
            runat="server"
        id="lbl3"
        Text="Enter Password"
    />
            runat="server"
        id="txt3"
        MaxLength=20        
        Password=True
    />