The primary purpose of a Field object is to contain the parameters you need to process a single field on a form. Those parameters are a rectangle, measured in pixels relative to the top left corner of the template image; a set of construction parameters, a set of processing operations, and some miscellaneous data.

A FormDefinitionFile object reads and writes Field properties to a form definition file. If you create your own class, derived from FormDefinition, you must read and write fields as you read and write the rest of the form definition.

System.Object
   Accusoft.FormDirectorSdk.Field

Reference

Field Members
Accusoft.FormDirectorSdk Namespace