Select a regular expression to be used to check the validity of the data entered in the control.
In this property, you can enter a Regular Expression that will be used to determine the validity of a submitted value. A submitted value that fails to comply with the regular expression will cause an error message to be displayed.
Within the property, there are two regular expressions; one for validating email addresses and another for 5-digit zip codes. Besides these, you can type in your own regular expression.
Important: The regular expressions should be set taking into consideration the programming language.