Referencing AJAX MaskedEditExtender in code behind
<p>Found this code to dynamically create an AJAX MaskedEdit Textbox...</p>

<pre><code>    Dim txt As New TextBox()
    txt.ID = "txt_name"
    Panel1.Controls.Add(txt)

    Dim mee As New MaskedEditExtender()
    mee.Mask = "999-999-9999"
    mee.MaskType = MaskedEditType.Number
    mee.InputDirection = MaskedEditInputDirection.LeftToRight
    mee.TargetControlID = "txt_name"
    Panel1.Controls.Add(mee)
</code></pre>

<p>and "ToolkitScriptManager" is properly referenced on my Master page.</p>

<p>Intellisense is not finding the "MaskedEditExtender", what do I have to include (VB.NET 2008) to properly reference it?</p>