uclose command

Format

UCLOSE FileHandle THEN statement(s) ELSE statement(s)

Description

The command fails if FileHandle is not valid. If an error occurs, the ELSE clause executes. If the uerror() function is called, the appropriate error code is returned.

Example(s)

These statements open, and then close, the \books\chap1.txt file:

FileName="c:\books\chapt1.txt"
UOPEN FileName FOR READ TO FileHandle ELSE
   PRINT "Unable to open ":FileName
   STOP
END
UCLOSE FileHandle ELSE
   STOP
END

See also

O/S interoperability commands and functions; ucreate command

udelete command; uerror() function

uexecute command; ulock command

ulseek() function; umessage command

uopen command; uread command

ureadline() function; usystem() function

uwaitfor command; uwrite command