completely customizable to any set of alpha-numeric characters and can limit any spot within themask by alphabetic, numeric, or alphanumeric placeholders.The Input Mask server control is an input control that lets the user enter text inside a presetmask. The preset masks are completely customizable to any set of alpha-numeric characters and canlimit any spot within the mask by alphabetic, numeric, or alphanumeric placeholders. The textdisplayed in the Input Mask control is specified or determined by using the Text property and theinputted, or un- masked, text is determined by using the TextUnMasked property which is read-only.The Input Mask control contains all the members of the System.Web.UI.WebControls . Textboxservercontrol. In addition, several other members have been added to facilitate the implementation ofthe mask capabilities such as Mask, MaskCharAlpha, MaskCharNumeric, MaskCharAlphaNumeric , MaskCharDisplayand a series of RegEx properies for validation and method invoking.