HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

              INT 21,5F  AL=00  Get Redirection Mode  (DOS 3.1+)


       AH = 5F
       AL = 00
       BL = redirection type
          = 03  printer
          = 04  disk drive


       on return:
       AX = error code if CF is set
       BH = device redirection state
          = 00  redirection off
          = 01  redirection on


       - determines if disk or printer redirection is enabled
       - fails if file sharing is not loaded


              INT 21,5F  AL=01  Set Redirection Mode  (DOS 3.1+)


       AH = 5F
       AL = 01
       BH = device redirection state
          = 00  turn redirection off
          = 01  turn redirection on
       BL = redirection type
          = 03  printer
          = 04  disk drive


       on return:
       AX = error code if CF is set


       - enables or disables disk or printer redirection
       - local devices are used when redirection is off
       - fails if file sharing is not loaded


           INT 21,5F  AL=02  Get Redirection List Entry  (DOS 3.1+)

       AH = 5F
       AL = 02
       BX = redirection list index
       DS:SI = far pointer to a 16 byte buffer to hold device name
       ES:DI = far pointer to a 128 byte buffer to hold network name

       on return:
       AX = error code if CF is set
          = 1  invalid function code
          = 12 no more files
       BH = device status flag,
          bit 0 = 0  device valid
          bit 0 = 1  device invalid
       BL = device type
          = 3  printer
          = 4  drive
       CX = stored parameter value
       DS:SI = far pointer to ASCIIZ local device name
       ES:DI = far pointer to ASCIIZ network name

       - value returned in CX is the value previously passed to
         INT 21,5F with subfunction 3 in register CX
       - registers DX and BP are destroyed
       - fails if file sharing is not loaded


                INT 21,5F  AL=03  Redirect Device  (DOS 3.1+)

       AH = 5F
       AL = 03
       BL = device type
          = 3 if printer
          = 4 if drive
       CX = parameter to save for caller
       DS:SI = far pointer to ASCIIZ local device name
       ES:DI = far pointer to ASCIIZ network name followed
               by ASCIIZ password

       on return
       AX = error code if CF is set
          = 1  invalid function code or
               invalid source or destination string format or
               source device already redirected
          = 3  path not found
          = 5  access denied
          = 8  insufficient memory

       - parameter passed in CX can later be retrieved by calls
         to INT 21,5F subfunction 2
       - local device name in DS:SI can be a drive designator
         (D:), a printer name (PRN or LPTx), or a null string
       - when a null string is followed by a password is used, DOS
         tries granting access to the network directory using the
         given password
       - fails if file sharing is not loaded


           INT 21,5F  AL=04  Cancel Device Redirection  (DOS 3.1+)


       AH = 5F
       AL = 04
       DS:SI = far pointer to ASCIIZ local device name


       on return
       AX = error code if CF set
          = 01  function code invalid
                ASCIIZ string is not an existing source device
          = 0F  redirection paused on server


       - local device name in DS:SI can be a drive designator
         (D:), a printer name (PRN or LPTx), or a string beginning
         with 2 backslashes "\\"
       - when two backslashes are used for the string the connection
         between the local machine and network directory terminates
       - fails if file sharing is not loaded

       INT 21,5F  AL=05  Get Redirection List Extended Entry (DOS 4.0+)

       AH = 5F
       AL = 05
       BX = redirection list index
       DS:SI = pointer to buffer to receive ASCIIZ source device name
       ES:DI = pointer to buffer to receive ASCIIZ network path

       on return
       AX = error code if CF set
       BH = device status flag (bit 0 clear if valid)
       BL = device type
          = 03  printer device
          = 04  disk device
       CX = stored user parameter value
       BP = NETBIOS local session number
       DS:SI = pointer to buffer containing ASCIIZ source device name
       ES:DI = pointer to buffer containing ASCIIZ network path


       - retrieves the status, type, source and target of a given redirection
       - fails if file sharing is not loaded


              INT 21,5F  AL=06  Get Redirection List (DOS 4.0+)


       AH = 5F
       AL = 06

       - no information is currently available for this subfunction

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