Input Mask in Textbox?

[Tony]

Hello everyone...
Just wondering is it possible to have input mask in a textbox control? i
want my phone number textbox to force the user to enter in this format (__)
____ ____
Is there any way to do it in a text box control.. or any other control that
can make this possible?
Thanks
Tony

 

[David Lau]

I think you can make it by creating regular expression and DFA.