411 REFERENCE · Wikibooks
Futurebasic/Language/Reference/usr
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
This function calls one of several low-level subroutines built into FB. The fnIndicator parameter indicates which routine to call; use one of the constants shown in the table below.
NEED IMAGE!!!!!
Example:
One of the most useful USR functions is USR _fileAddr. You can use the LOCAL FN shown here to display information about an open file. LOCAL FN DisplayFileInfo(fileID)
pbPtr& = USR _fileAddr(fileID)
LONG IF pbPtr& <> _nil
Don't know what the print thing is
END IF
See Also
SQR; SIN; COS; "File Manager" chapter in Inside Macintosh: Files