FieldDescriptionData Properties | 
          
The FieldDescriptionData type exposes the following members.
| Name | Description | |
|---|---|---|
| FieldName | 
            In CPCL, this field is always null. In ZPL, this field will correspond to the optional name parameter of the ^FN command, or null if the parameter is not present  | |
| FieldNumber | 
            In CPCL, this number will be the number of the variable field in the format. The fields are numbered starting at 1. In ZPL, this number will correspond to the ^FN number.  |