Input Mask :)

Input mask is  in computer programming, an input mask refers to a string expression, defined by a developer, that governs what a user is allowed to enter in as input in a text box. It can be said to be a template, or set format that entered data must conform to, mainly used for the purposes of data integrity by preventing transcription errors. The syntax of this string expression differs from implementation to implementation, but the fundamental input types are all supported.

INPUT MASK DEFINITION	EXAMPLES OF VALUES
(000) 000-0000	(206) 555-0248
(999) 999-9999!	(206) 555-0248 ( ) 555-0248
(000) AAA-AAAA	(206) 555-TELE
#999	-20 2000
>L????L?000L0	GREENGR339M3 MAY R 452B7
>L0L 0L0	T2F 8M4
00000-9999	98115- 98115-3007
>L<??????????????	Maria Pierre
ISBN 0-&&&&&&&&&-0	ISBN 1-55615-507-7 ISBN 0-13-964262-5
>LL00000-0000	DB51392-0493