.filesize R/O Property
| Function: | Returns the size, in bytes, of the file opened "on" the currently selected file number (selection is made through the fd.filenum). Returns zero if no file is currently opened. | 
| Type: | Dword | 
| Value Range: | 0 to "whatever is physically possible for the currently existing flash disk." | 
| See Also: | Writing To and Reading From Files, fd.getdata, fd.setdata, fd.pointer, fd.setpointer |