| 0 | Returns the identifiers of all fields. |
| &H1 | Returns only identifiers of fields which are both changeable and deleteable. |
| &H2 | Returns only identifiers of fields which are unchangeable. |
| &H4 | Returns only identifiers of fields which are undeleteable. |
| &H200 | Returns only identifiers of fields which have the type txFieldExternalLink. |
| &H400 | Returns only identifiers of fields which have the type txFieldInternalLink. |
| &H800 | Returns only identifiers of fields which have the type txFieldPageNumber. |
| &H1000 | Returns only identifiers of fields which have the type txFieldHighlight. |
| &H2000 | Returns only identifiers of fields which have the type txFieldTopic. |
| &H8000 | Returns only identifiers of fields which have the type txFieldMSWord. |
| &H10000 | Returns only identifiers of fields which have the type txFieldHighEdit. |
| &H20000 | Returns only identifiers of fields which have the type txFieldAllPages. |
| &H40000 | Returns only identifiers of fields which have the type txFieldCheckBox. |
| &H80000 | Returns only identifiers of fields which have the type txFieldComboBox. |
| &H100000 | Returns only identifiers of fields which have the type txFieldFormText. |
| &H200000 | Returns only identifiers of fields which have the type txFieldDate. |