| File Processing Functions | 
 | 
There are twelve file processing functions - all expect a file number as first argument.
| Same as FID( ) but always returns PxPlus native format. | |
| Returns a description of characteristics of the file specified; returns 1 of 5 formats depending on the 'FF' parameter. | |
| Returns detailed physical aspects of the file specified. | |
| Returns an index of the next record in the file. Generates an error at the end of file. | |
| Returns a key of the current (last read/written) record.Generates an error at the start of file. | |
| Returns the key of first record on the file. Generates an error if no records exist. | |
| Returns the key of the last record on the file. Generates an error if no records exist. | |
| Returns the key of the record after the next record to be read. | |
| Returns the key of the previous record - keyed files only. Generates an error at the start of file. | |
| Returns the key of the next record. Generates an error at the end of file. | |
| Returns contents of a record - equivalent to READ RECORD. See Processing Records. | |
| Returns the record number of a specified record in key sequence. | 
See System Functions for a complete list of system functions.