These constants are only available when your project has an explicit reference to the appropriate type library containing these constant definitions.
| Constant | Value | Description |
|---|---|---|
| ForReading | 1 | Open a file for reading only. You can't write to this file. |
| ForWriting | 2 | Open a file for writing. If a file with the same name exists, its previous contents are overwritten. |
| ForAppending | 8 | Open a file and write to the end of the file. |