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  Description:  Create Temporary File     DOS 3 Only
 
  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.
 
  Input                                          Output
  ═══════════════════════════════════            ═════════════════════════
  AH=5AH                                         If function successful
  CX=attribute (bits can be combined)            Carry flag=clear
     Bit(s)  Significance (if set)               AX=handle
     0       read-only                           DS:DX=segment:offset of
     1       hidden                               complete ASCIIZ pathname
     2       system                              If function unsuccessful
     3-4     reserved (0)                        Carry flag=set
     5       archive                             AX=error code
     6-15    reserved (0)
  DS:DX=segment:offset of ASCIIZ path
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