Returns or changes the field flags of a form field represented by this annotation
object. Field flags have the following meaning:
Bit 1: Read-only. If set, the field cannot be changed.
Bit 2: Required. If set, the field must be filled in to be able to submit the form.
Bit 3: No export. If set, the field must not be exported when the form is submitted.
Bit 13: Multiline. Specific to text fields. If set, the field may
contain multiple lines of text.
Bit 14: Password. Specific to text fields. If set, this is a password
field.
Bit 15: No toggle to off. Specific to radio buttons. If set, exactly one
radio button can be selected in a group. If clear, clicking the selected
radio button deselects it, leaving no buttons selected.
Bit 16: Radio. If set, this field is a radio button.
Bit 17: Pushbutton. If set, this field is a pushbutton.
Bit 18: Combo. Specific to choice fields. If set, the field is a combo box, otherwise it is a list box.
Bit 19: Edit. Specific to choice fields. If set, the combo box includes an editable box as well as a drop list.
Otherwise, the combo only includes a drop list.
Bit 20: Sort. Specific to choice fields. If set, the field's option items should be sorted alphabetically.
Bit 21: File select. Specific to text fields. If set, this is a file selection field.
Bit 23: Do not spell-check. Specific to text and choice fields. If set, the field will not be spell-checked.
Bit 22: Multi-select. Specific to choice fields. If set, more than one of the field's option items
can be selected.
Bit 24: Do not scroll. Specific to text fields. If set, the field will not scroll.
For more information, see Chapter 11 - Forms.