Function  5Ah  Create Temporary File       (DOS 3.x)
	       Creates a file with a unique name, in the current or specified
	       directory on the default or specified disk drive, and returns a
	       handle that can be used by the program for subsequent access to
	       the file. The name generated for the file is also returned in a
	       buffer specified by the program.
entry   AH     5Ah
	CX     attribute
	       00h    normal
	       01h    read only
	       02h    hidden
	       04h    system
	DS:DX  segment:offset of ASCIIZ path
return	AX     handle
	DS:DX  segment:offset of complete ASCIIZ path and file name
	CF     set if error
	       AX      error code
note 1) The ASCIIZ path supplied to this function should be followed by at
	least 13 additional bytes of buffer space. MS-DOS adds a backslash (\)
	to the supplied path, if necessary, then appends a null-terminated
	filename that is a function of te current time.
     2) Files created with this function are not automatically deleted when the
	caling program terminates.
     3) The funciton fails if:
	a) any element of the pathname does not exist.
	b) The file is being created in the root directory and the root
	   directory is full.
     4) If the program is running on a network, the file is created and opened
	for read/write access in compatibility sharing mode.
     5) See also Int\21f\3C and Int\21f\5B which provide additional
	facilities for creating files.