| Purpose | Return the file-system name of an open file. | 
| Syntax | a$ = FILENAME$(filenum&) | 
| Remarks | a$ receives the name of the open file identified by the file number filenum&. This function is not valid with a file opened using OPEN HANDLE, COMM OPEN, TCP OPEN, or UDP OPEN. | 
| See also | |
| Example | OPEN "MYFILE.TXT" FOR INPUT AS #1 a$ = FILENAME$(1) CLOSE #1 |