Bool32 FIsARefNum(refNum);
Determines whether refNum is a valid file refnum.
| Name | Type | Description |
|---|---|---|
| refNum | LVRefNum | File refnum you want to verify. |
Bool32, which can contain the following values.
| Value | Description |
|---|---|
| TRUE | File refnum has been created and not yet disposed. |
| FALSE | File refnum is not valid. |