The format for this field.
The PDF specification does not define how fields should be formatted.
Acrobat uses a set of standard JavaScripts to perform field formatting.
This property reflects the JavaScript formatting function which
is being used and the values which are being passed to it. A typical
value might be:
AFNumber_Format(2, 3, 0, 0, "", true);
This defines a number format with two decimal places. For a precise
understanding of the purposes of the other parameters you will need
to see the JavaScripts which come installed with Acrobat.
Other typical formatting functions are AFPercent_Format, AFSpecial_Format,
AFDate_Format and AFTime_Format. Again for full details you should
see the JavaScripts which come installed with Acrobat.
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