Screen Masking for Windows Phone 8 Textbox Control

This is a pretty common theme on google.  Given the variety of explanations which were quite interesting and thorough but not exactly what I needed.  I finally reverted back to MSDN and found
what I was looking for.  the Textbox control in Silverlight supports a property called InputScopeNameValue.  This allows one to determine the keyboard layout of the SIP (software input panel).    One just sets the property to the desired setting to control input on the textbox.

<TextBox Text="HelloWorld">
    <TextBox.InputScope>
        <InputScope>
            <InputScopeName NameValue="Url" />
        </InputScope>
    </TextBox.InputScope>
</TextBox>

SIP layout	XAML or enumeration value	SIP description
Default	Default, and other standard input scope values	Standard QWERTY layout
Text	Text	Standard layout with features such as autocorrect and text suggestion
Web	Url	Standard layout with .com and customized Enter key for typing URLs.
E-mail address	EmailSmtpAddress	Standard layout with .com and @ key.
E-mail name or address	EmailNameOrAddress	Standard layout with .com and @ key, and easy access to phone number layout.
Maps	Maps	Standard layout with a customized Enter key. Used to type a location to search for on a map
Phone number	TelephoneNumber	12-key layout
Search	Search	Semi-transparent layout with a Search and .com key.
SMS contact	NameOrPhoneNumber	Standard layout with access to phone number layout. Used to type in the SMS To field
Chat	Chat	Text input that uses intelligent features such as abbreviations

Source:http://msdn.microsoft.com/en-us/library/ff426929(v=vs.95).aspx