"KE" Key Exists
- Command string:
- CMND$ = "KE\{KeyNo}\{RecNo}\{FileNo}\{KeyString}"
| KeyNo | Key number |
| RecNo | Record number |
| FileNo | File number |
| KeyString | Key value |
- Purpose:
- Check the existance of a key.
- Description:
- This command searches the index file for the specified key value ("KeyString") and record number ("RecNo"). If an exact match is found for both of these values, a errorcode of 0 is returned by FATS. Otherwise, it returns a nonzero status in the ERRORCODE variable. This command is useful for checking for the existance of a key.
- Parameters returned:
| ERRORCODE: | Errorcode or 0 (no error) |
| RECNO: | Record number |
| FATSKEY: | Key value (or KEYADR=address of key) |
- Example:
- CMND$ = "KE\1\"+STR$(RECNO)+"\1\"+KEYSTRING$
- See also:
"S" Search; page 4-77
"G" Search Generic; page 4-34
© 2008 
GCS Software, Udo Gertz
