Function 5E02h          Set Printer Setup                            DOS 3.1+

    Defines a string of control characters that DOS adds to the
    beginning of each file sent to a network printer.

        Entry   AX    = 5E02h
                BX    = Assign-list index
                CX    = Length of setup string (maximum 64 bytes)
                DS:SI = Pointer to printer setup string

       Return   Nothing
                or
                AX = Error code, if CF is set
                     | 01h Invalid function (Network not running)