We don't have a Telerik TextBox control. Our suite of controls provides the MaskedInput controls you refered to as well as a RadWatermarkTextBox control.
But if you need to use a sample TextBox control, you can use the MS TextBox along with any RadControls in your application and you can style the TextBox to match the style of the RadControls taking advantage of the Telerik built-in themes. All of our themes can be applied to the TextBox control thus providing a consistant look in your application.
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