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  Description:  Cancel Device Redirection     DOS 3.1 Only
 
  Cancels a previous redirection request by removing the association of a
  local device name with a network name. This function call is only avail-
  able when Microsoft Networks is running and the file-sharing module
  (SHARE.EXE) has been loaded.
 
  Input                                Output
  ═════════════════════════            ══════════════════════════════
  AH=5FH                               If function successful
  AL=04H                               Carry flag=clear
  DS:SI=segment:offset of              If function unsuccessful
   ASCIIZ local device name            Carry flag=set
                                       AX=error code
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