I want my text box to default all numbers that are typed into it to 3 decimal places.

ex:
you type 1, hit enter

and

it shows 1.000

The formatting that I have found truncates all the 0's and cuts them off leaving only the 1 instead of 1.000. Is there any way of setting the format to look this way without writing code? If not, does anyone have any ideas or code examples to set up the text boxes this way?

Thanks