Manage a Form with Legacy Form Fields. Legacy form fields are the field types that were available in earlier versions of Word processing. The Legacy Forms group (visible after you click the Legacy Tools icon) includes three types of form fields you can insert in a document: text, check box, drop-down, date etc., see more FormFieldType. Each of these form fields allows the user of the form to select or enter information of the type that you deem appropriate.
Updates form fields in the document based on the provided collection of form fields.
Remarks
The FormFieldManager class provides functionality for handling form fields in a document. It allows users to obtain, update, fix, check for invalidity, and remove form fields from the document.