You can set field validation rules for one-line and scrolling text boxes. For both types of text box, you can set rules that limit the data type to text, integers, or real numbers.
If you limit a field to text, you can add other rules that specify whether alphabetic characters, numeric characters, white space, or specific punctuation characters are allowed. You can also limit the length of an entry and supply a range of values in which text must fall. Text ranges follow the rules of alphabetical order.
If you limit a field to integers, you can limit the punctuation that can be used in the integer, the length of the number, and the range of integer values to accept.
If you limit a field to real numbers, you can limit the punctuation that can be used in the number, the character to use as the decimal symbol, the length of the entry, and the range of numeric values.