Q:  How do I set a format for a data field?

A:
1.  Select the table object, and double click.

2.  Select the field that you want to format.

3.  Use the DisplayFormat and the EditFormat properties to do what you want.
DisplayFormat works for when the field does not have focus.
EditFormat works for when the field has focus.

Use the commands as you would for the first parameter of the FormatFloat function, but without the quotes.